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   "cells": [
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "# Assignment 4\n",
      "### [\uc815\ubcf4]\n",
      "#### 1) Due Date: 2014\ub144 11\uc6d4 21\uc77c (\uae08\uc694\uc77c), 23\uc2dc 59\ubd84\n",
      "#### 2) \uc81c\ucd9c\ubc29\ubc95: ipython notebook\uc73c\ub85c \uc791\uc131\ub41c \ub0b4\uc6a9\uc744 nbviewer\uc5d0 \uc62c\ub824 \ud574\ub2f9 URL\uc744 EL \uc0ac\uc774\ud2b8\uc5d0 \uc81c\ucd9c\n",
      "- Assignment 1, 2, 3 \ub0b4\uc6a9 \ucc38\uace0\n",
      "\n",
      "#### 3) \ub0b4\uc6a9: \ubc18\ub4dc\uc2dc python code\uc640 \uc218\ud589 \uacb0\uacfc\ub97c ipython notebook \ub0b4\uc5d0 \uc791\uc131\ud558\uc5ec \ub123\uace0 \uc774\uc5d0 \ub300\ud55c \uc124\uba85\ub4f1\uc744 \ud574\ub2f9 \ucf54\ub4dc \uc544\ub798\uc5d0 markdown cell\uc5d0 \ub123\uc5b4 \uae30\uc785\ud558\uc2dc\uc624.\n",
      "#### 4) \uc219\uc81c\uc774\ud6c4 \uc18c\uac10: 9\uac1c\uc758 \ubb38\uc81c\ub97c \ubaa8\ub450 \ud47c \uc774\ud6c4\uc5d0 \ud604\uc7ac\uae4c\uc9c0 \uac15\uc758\ub97c \ub4e4\uc740 \uc774\ud6c4\uc758 \uc18c\uac10, \uc219\uc81c\ub97c \ud55c \uc774\ud6c4\uc758 \uc18c\uac10, \ub610\ub294 \uc804\ud558\uace0\uc790 \ud558\ub294 \ub9d0 \ub4f1\uc744 \uc9e7\ub9c9\ud558\uac8c\ub77c\ub3c4 \uc88b\uc73c\ub2c8 \ub9c8\uc9c0\ub9c9\uc5d0 \ud568\uaed8 \uc791\uc131\ud558\uc5ec \uc81c\ucd9c\ud558\uc2dc\uc624. \n",
      "#### 5) \ubb38\uc81c (\ucd1d 9\uac1c)"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [1\ubc88 \ubb38\uc81c] \ud30c\uc77c s.txt \ub0b4\uc758 \ub2e4\uc74c \ub0b4\uc6a9\uacfc \ud568\uaed8 \uc544\ub798 \ubb38\uc81c\uc758 \ucf54\ub4dc\ub97c \uc81c\uc2dc\ud558\uc2dc\uc624. \n",
      ">pig ham<br/>\n",
      ">cat dog<br/>\n",
      ">ham bird<br/>\n",
      ">dog pig<br/>"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  - 1) \ud30c\uc77c s.txt\uc744 \uc77d\uc5b4\uc11c \uac01 \ub77c\uc778\ub4e4\uc5d0 \uc788\ub294 \uccab \ubc88\uc9f8 \ub2e8\uc5b4(\ubb38\uc790\uc5f4)\ub4e4\uc744 \uae30\uc900\uc73c\ub85c \ub77c\uc778\ubcc4 \uc815\ub82c\ud6c4 \ud30c\uc77c s1.txt\uc5d0 \uadf8 \uacb0\uacfc\ub97c \uae30\ub85d\ud558\ub294 \ucf54\ub4dc\ub97c \uc791\uc131\ud558\uc2dc\uc624. \uc989, \ud504\ub85c\uadf8\ub7a8 \uc218\ud589 \ud6c4 s1.txt\uc5d0 \uc788\ub294 \ud30c\uc77c \ub0b4\uc6a9\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.\n",
      ">cat dog<br/>\n",
      ">dog pig<br/>\n",
      ">ham bird<br/>\n",
      ">pig ham<br/>"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  - 2) \ud30c\uc77c s.txt\uc744 \uc77d\uc5b4\uc11c \uac01 \ub77c\uc778\ub4e4\uc5d0 \uc788\ub294 \ub450 \ubc88\uc9f8 \ub2e8\uc5b4(\ubb38\uc790\uc5f4)\ub4e4\uc744 \uae30\uc900\uc73c\ub85c \ub77c\uc778\ubcc4 \uc815\ub82c\ud6c4 \ud30c\uc77c s2.txt\uc5d0 \uadf8 \uacb0\uacfc\ub97c \uae30\ub85d\ud558\ub294 \ucf54\ub4dc\ub97c \uc791\uc131\ud558\uc2dc\uc624. \uc989, \ud504\ub85c\uadf8\ub7a8 \uc218\ud589 \ud6c4 s2.txt\uc5d0 \uc788\ub294 \ud30c\uc77c \ub0b4\uc6a9\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.\n",
      ">ham bird<br/>\n",
      ">cat dog<br/>\n",
      ">pig ham<br/>\n",
      ">dog pig<br/>"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  - 3) \ud30c\uc77c s.txt\uc744 \uc77d\uc5b4\uc11c \uac01 \ub77c\uc778\ub4e4\uc5d0 \uc788\ub294 \ubaa8\ub4e0 \ub2e8\uc5b4\ub4e4\uc744 \uc21c\ucc28\uc801\uc73c\ub85c \ub2e4\uc2dc \ub098\uc5f4\ud558\ub418 \uac01 \ub77c\uc778\uc5d0 \uc138 \uac1c\uc758 \ub2e8\uc5b4\ub4e4\uc774 \uc624\ub3c4\ub85d \ud558\uc5ec s3.txt\uc5d0 \uae30\ub85d\ud558\ub294 \ucf54\ub4dc\ub97c \uc791\uc131\ud558\uc2dc\uc624. \uc989, \ud504\ub85c\uadf8\ub7a8 \uc218\ud589 \ud6c4 s3.txt\uc5d0 \uc788\ub294 \ud30c\uc77c \ub0b4\uc6a9\uc740 \ub2e4\uc74c\uacfc \uac19\ub2e4.\n",
      ">pig ham cat<br/>\n",
      ">dog ham bird<br/>\n",
      ">dog pig<br/>"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [2\ubc88 \ubb38\uc81c] \ub2e4\uc74c\uacfc \uac19\uc740 \uc870\uac74\ub4e4\uc744 \ucc38\uace0\ud558\uc5ec \ud68c\uc6d0 \uac00\uc785 \ubc0f \ub85c\uadf8\uc778 \ud504\ub85c\uadf8\ub7a8\uc744 \uc791\uc131\ud558\uc2dc\uc624. \n",
      "  - 1) \ud504\ub85c\uadf8\ub7a8 \uc2dc\uc791 \ud6c4 \ub2e4\uc74c\uacfc \uac19\uc740 \uba54\uc2dc\uc9c0\uac00 \ucd9c\ub825\ub418\uc5b4 1, 2, 3 \uc911 \ud558\ub098\uc758 \uac12\uc744 \uc785\ub825 \ubc1b\ub3c4\ub85d \ud55c\ub2e4.\n",
      ">Welcome to Our Service<br/>\n",
      ">1. Sign Up<br/>\n",
      ">2. Sign In<br/>\n",
      ">3. Quit<br/>\n",
      "  - 2) 1\uc744 \uc120\ud0dd\ud558\uba74 ID, Password, Name, School\uc758 4\uac00\uc9c0 \uc815\ubcf4\ub97c \uc785\ub825\ubc1b\uc544 \ud30c\uc77c\uc5d0 \uc800\uc7a5\ud558\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc791\uc131\ud55c\ub2e4.\n",
      "    - 2-1) \uc785\ub825\ub41c \ub0b4\uc6a9\uc740 access \ub77c\ub294 \uc774\ub984\uc758 \ud30c\uc77c \ub0b4\uc5d0 \uc800\uc7a5\ub41c\ub2e4. \n",
      "    - 2-2) access \ud30c\uc77c\uc758 \uac01 \ub77c\uc778\uc5d0\ub294 \uac00\uc785\ub41c \ud68c\uc6d0 \uac01\uac01\uc758 \uc815\ubcf4\uac00 \"id: password, name, school\" \ud615\ud0dc\ub85c \uc800\uc7a5\ub41c\ub2e4.\n",
      "    - 2-3) \uc989, \uac00\uc785 \ud68c\uc6d0\uc774 10\uba85\uc774\uba74 access \ud30c\uc77c \ub0b4\uc5d0 \ub77c\uc778 \uc218\ub3c4 \uc815\ud655\ud788 10\uc774\ub2e4.\n",
      "    - 2-4) \uc554\ud638\ud654 \ubc29\uc2dd\uc740 sha \ubaa8\ub4c8\uc744 \ud65c\uc6a9\ud55c\ub2e4. sha \ubaa8\ub4c8 \ud65c\uc6a9 \ubc29\ubc95\uc740 \ubcf8 \ubb38\uc81c\uc758 \ub9c8\uc9c0\ub9c9\uc5d0 \uc81c\uc2dc\ub41c sha \ud65c\uc6a9 \uc608\ub97c \ucc38\uace0\ud55c\ub2e4.\n",
      "      - \uc989, access \ud30c\uc77c \ub0b4\uc5d0 password \uc815\ubcf4\ub294 \uc554\ud638\ud654 \ub418\uc5b4 \uc800\uc7a5\ub418\uc5b4\uc57c \ud55c\ub2e4.\n",
      "    - 2-5) \ud68c\uc6d0 \uc815\ubcf4\ub97c \uc785\ub825 \ubc1b\uc744 \ub54c id\ub97c \uc785\ub825 \ubc1b\uc740 \uc9c1\ud6c4 access\ub97c \ud655\uc778\ud558\uc5ec \uc774\ubbf8 \uc874\uc7ac\ud558\ub294 id\uac00 \uc785\ub825\ub418\uc5c8\ub2e4\uba74 \ub2e4\uc74c \uba54\uc2dc\uc9c0\ub97c \ucd9c\ub825\ud558\uace0 id \uc815\ubcf4\ub97c \ub2e4\uc2dc \uc785\ub825\ubc1b\ub294\ub2e4.\n",
      "      - Sorry, the entered ID is already used.\n",
      "  - 3) 2\ub97c \uc120\ud0dd\ud558\uba74 ID, Password\uc758 2\uac00\uc9c0 \uc815\ubcf4\ub97c \uc785\ub825\ubc1b\ub294 \ud504\ub85c\uadf8\ub7a8\uc744 \uc791\uc131\ud55c\ub2e4.\n",
      "    - 3-1) \uc785\ub825\ub41c ID \uc815\ubcf4\uac00 access\uc5d0 \uc874\uc7ac\ud558\uc9c0 \uc54a\uc73c\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 \uba54\uc2dc\uc9c0\ub97c \ucd9c\ub825\ud558\uace0 \ub2e4\uc2dc \uc785\ub825\ubc1b\ub294\ub2e4.\n",
      "      - Sorry, you are not a registered member.\n",
      "    - 3-2) \uc785\ub825\ub41c ID\uac00 \uc62c\ubc14\ub974\uac8c \uc874\uc7ac\ud558\uc9c0\ub9cc Password \uc815\ubcf4\uac00 access \ud30c\uc77c\uc5d0 \uc788\ub294 \uc815\ubcf4\uc640 \ubd88\uc77c\uce58 \ud558\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 \uba54\uc2dc\uc9c0\ub97c \ucd9c\ub825\ud558\uace0 \ub2e4\uc2dc \uc785\ub825\ubc1b\ub294\ub2e4.\n",
      "      - Sorry, the entered password is not correct.\n",
      "      - \uc774 \ub54c\uc5d0\ub3c4 \uc0ac\uc6a9\uc790\uac00 \uc785\ub825\ud55c \ud328\uc2a4\uc6cc\ub4dc \uc815\ubcf4\uc640 \ud568\uaed8 sha \ubaa8\ub4c8\uc774 \ud65c\uc6a9\ub418\uc5b4\uc57c \ud55c\ub2e4.\n",
      "    - 3-3) \uc785\ub825\ub41c ID\uc640 Password\uac00 \ubaa8\ub450 \uc62c\ubc14\ub974\uba74 \ub2e4\uc74c\uacfc \uac19\uc740 \uba54\uc2dc\uc9c0\ub97c \ucd9c\ub825\ud55c\ub2e4.\n",
      "      - Hello [name]!\n",
      "      - \uc704 [name]\uc5d0\ub294 access\uc5d0 \uae30\ub85d\ub418\uc5b4 \uc788\ub294 name \uc815\ubcf4\ub97c \ucd9c\ub825\ud55c\ub2e4.\n",
      "  - 4) 3\uc744 \uc120\ud0dd\ud558\uba74 \ud504\ub85c\uadf8\ub7a8\uc774 \ub05d\ub09c\ub2e4.\n",
      "  - [\ucc38\uace0] sha \ubaa8\ub4c8 \ud65c\uc6a9 \uc608"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import sha\n",
      "password_plain = \"my password\"\n",
      "password_encrypted = sha.new(password_plain).hexdigest()\n",
      "print password_encrypted"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "a2f8f7fa195a080a22a689041daa8f2044f9f336\n"
       ]
      }
     ],
     "prompt_number": 1
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [3\ubc88 \ubb38\uc81c] range() \ud568\uc218\uc640 \uc720\uc0ac\ud55c frange() \ud568\uc218\ub97c \ub2e4\uc74c \uc870\uac74\uc744 \ucc38\uace0\ud558\uc5ec \ub9cc\ub4dc\uc2dc\uc624.\n",
      "  - 1) frange()\uc758 \uc778\uc790 \uad6c\uc131\uc740 \ub2e4\uc74c\uacfc \uac19\uc774 range\uc640 \ub3d9\uc77c\ud558\uc9c0\ub9cc \uac01 \uc778\uc218\ub4e4\uc740 \uc74c\uc218\ub97c \ubc1b\uc9c0 \uc54a\ub294\ub2e4\uace0 \uac00\uc815\ud55c\ub2e4.\n",
      "  > range(stop)<br/>\n",
      "  > range(start, stop[, step])<br/>\n",
      "  - 2) frange() \ud568\uc218\uc758 \uc778\uc790\uc5d0 \ub300\ud55c \uae30\ubcf8 \uc2dc\uc791(start) \uac12\uc740 0.0\uc774\uace0, \uae30\ubcf8 \ub2e8\uacc4(step) \uac12\uc740 0.1\uc774\ub2e4. \n",
      "  - 3) frange \uc0ac\uc6a9 \uc608\n",
      "    - 3-1) frange(0.5)\n",
      "      - [0.0, 0.1, 0.2, 0.3, 0.4]\n",
      "    - 3-2) frange(1.0, 2.0)\n",
      "      - [1.0, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9]\n",
      "    - 3-3) frange(2.2, 4.0, 0.5)\n",
      "      - [2.2, 2.7, 3.2, 3.7]"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [4\ubc88 \ubb38\uc81c] \uac00\ubcc0\uc778\uc218\ub97c \ubc1b\ub294 \ud568\uc218 sum()\uc744 \ub2e4\uc74c\uacfc \uac19\uc740 \uc870\uac74\uc744 \ucc38\uace0\ud558\uc5ec \uad6c\ud604\ud558\uc2dc\uc624\n",
      "  - 1) sum() \uc0ac\uc6a9 \uc608 \n",
      "    - sum()\n",
      "      - 0\n",
      "    - sum(1, 2)\n",
      "      - 3\n",
      "    - sum(1, 2, 3, 4, 5)\n",
      "      - 15\n",
      "    - sum(1, 5, 7, 2, -10)\n",
      "      - 5"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [5\ubc88 \ubb38\uc81c] \uc5ec\ub7ec \ub2e8\uc5b4\ub85c \uc774\ub8e8\uc5b4\uc9c4 \ubb38\uc790\uc5f4\uc744 \uc785\ub825\ubc1b\uc544 \uac01 \ub2e8\uc5b4\uc758 \uccab\uae00\uc790\ub85c \uc774\ub8e8\uc5b4\uc9c4 \ub2e8\uc5b4\ub97c \ub300\ubb38\uc790\ub85c \ucd9c\ub825\ud558\ub294 myinitial() \ud568\uc218\ub97c \ub2e4\uc74c \uc870\uac74\uc744 \ucc38\uace0\ud558\uc5ec \uc791\uc131\ud558\uc2dc\uc624.\n",
      "  - 1) split, map, join \ud568\uc218\ub97c \ubaa8\ub450 \uc774\uc6a9\ud574\uc57c \ud55c\ub2e4.\n",
      "  - 2) myinitial() \ud568\uc218 \uc0ac\uc6a9 \uc608\n",
      "    - myinitial(\"as soon as possible\")\n",
      "      - ASAP"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [6\ubc88 \ubb38\uc81c] \uc74c\uc774 \uc544\ub2cc \uc815\uc218 n\ub97c \uc785\ub825\ubc1b\uc73c\uba74 n! (factorial)\uc744 \uacc4\uc0b0\ud558\ub294 myfact() \ud568\uc218\ub97c \uc7ac\uadc0\uc801 \ud568\uc218\ub85c \uad6c\ud604\ud558\uc2dc\uc624."
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [7\ubc88 \ubb38\uc81c] (\uc11c\uc220\ud615) import string \uacfc from string import * \uc758 \ucc28\uc774\uc810\uc744 \uc124\uba85\ud558\uc2dc\uc624."
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [8\ubc88 \ubb38\uc81c] \uc774\uc804 Assignment 3\uc758 \ub9c8\uc9c0\ub9c9 \ubb38\uc81c\ub294 \uc6f9 URL\ub85c \uc9c0\uc815\ub41c \uc6f9\ud398\uc774\uc9c0\ub97c \ubb38\uc790\uc5f4\ub85c \uac00\uc838\uc640 \ubaa8\ub4e0 HTML \ud0dc\uadf8 \ubc0f CSS\uc640 Javascript\ub97c \uc81c\uc678\ud55c \uc21c\uc218 \ud14d\uc2a4\ud2b8\ub97c \uc5bb\uc5b4\ub0b4\uace0 \uadf8 \uc548\uc5d0 \uc874\uc7ac\ud558\ub294 \ub2e8\uc5b4\ub97c \ucd94\ucd9c\ud558\uc5ec \uac01 \ub2e8\uc5b4\ub4e4\uc5d0 \ub300\ud574 \ucd9c\ud604\ube48\ub3c4\ub97c \uc0ac\uc804\ud615\ud0dc({'world': 2, 'hello': 1, 'python': 1})\ub85c \uc800\uc7a5\ud558\uc5ec \ucd9c\ub825\ud558\ub294 \uac83\uc774\uc5c8\ub2e4. \uc774\ubc88\uc5d0\ub294 Assignment 3\ub97c \ud655\uc7a5\ud558\uc5ec \ub2e4\uc74c\uacfc \uac19\uc740 \uc870\uac74\uc744 \ub9cc\uc871\ud558\ub3c4\ub85d \uad6c\ud604\ud558\uc2dc\uc624. \n",
      "  - 1) \uac01 URL\ub85c \uc9c0\uc815\ub41c \uc6f9\ud398\uc774\uc9c0\uc758 HTML \uc18c\uc2a4\ub97c \ud30c\uc77c\ub85c \uc800\uc7a5\ud558\uc2dc\uc624. \n",
      "    - URL\uc774 http://URL \uc774\ub77c\uba74 \ud30c\uc77c\uba85\uc740 URL.html \uc774\ub2e4. \n",
      "    - \uc608: URL\uc774 http://www.koreatech.ac.kr \uc774\ub77c\uba74 \ud30c\uc77c\uba85\uc740 www.koreatech.ac.kr.html \uc774\ub2e4. \n",
      "  - 2) \ub2e8\uc5b4\uc758 \ucd9c\ud604\ube48\ub3c4\uac00 \ub2f4\uae34 \uc0ac\uc804 \uac1d\uccb4\ub97c \uc704 HTML \uc18c\uc2a4 \ud30c\uc77c\uacfc \ub3d9\uc77c\ud55c \ud3f4\ub354\uc5d0 \ud30c\uc77c\ub85c \uc800\uc7a5\ud558\uc2dc\uc624.\n",
      "    - \uad50\uc7ac 11-2 \ud53c\ud074\ub9c1 \ubc29\ubc95\uc744 \ud65c\uc6a9\ud558\uc2dc\uc624. \n",
      "    - URL\uc774 http://URL \uc774\ub77c\uba74 \ud30c\uc77c\uba85\uc740 URL.words.frequency \uc774\ub2e4.\n",
      "    - \uc608: URL\uc774 http://www.koreatech.ac.kr \uc774\ub77c\uba74 \ud30c\uc77c\uba85\uc740 www.koreatech.ac.kr.words.frequency \uc774\ub2e4.\n",
      "  - 3) \ucd5c\uc18c 5\uac1c \uc774\uc0c1\uc758 \uc6f9 \uc0ac\uc774\ud2b8\uc5d0 \ub300\ud55c HTML \uc18c\uc2a4 \ud30c\uc77c\uacfc \ub2e8\uc5b4 \ucd9c\ud604\ube48\ub3c4 \ud30c\uc77c\uc744 \uc800\uc7a5\ud558\uc2dc\uc624. \n",
      "    - \uc989, \ucd1d 10\uac1c\uc758 \ud30c\uc77c\uc744 \ub3d9\uc77c\ud55c \ud3f4\ub354\uc5d0 \uc0dd\uc131\ud558\uc2dc\uc624."
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "- [9\ubc88 \ubb38\uc81c] \uc704 \ubb38\uc81c\uc5d0\uc11c \uc800\uc7a5\ud55c \ubaa8\ub4e0 words.frequency \ud30c\uc77c\ub4e4\uc744 \ub85c\ub4dc \ud558\uc5ec \ubcf8\uc778\uc774 \uc800\uc7a5\ud558\uc5ec \ubd84\uc11d\ud55c \uc0ac\uc774\ud2b8\ub4e4\uc5d0\uc11c \uac00\uc7a5 \ub9ce\uc774 \ucd9c\ud604\ud55c \ub2e8\uc5b4\ub97c \ubf51\uc544 \uc81c\uc2dc\ud558\uc2dc\uc624.\n",
      "  - 8\ubc88 \ubb38\uc81c\uc640\ub294 \ub2e4\ub978 \ubcc4\ub3c4\uc758 \ud504\ub85c\uadf8\ub7a8\uc73c\ub85c \uc791\uc131\ud558\uc2dc\uc624."
     ]
    }
   ],
   "metadata": {}
  }
 ]
}