def Q(x):
    print('NEXT', m:='GSAPBIBKYE'[x::2]); a, b = map(int, input().split())
    if a == 0: print('ASK', m), exit(0)
    return b
N = int(input()); D = L = 1
while 1-(Q(1), Q(1), Q(0))[2]: D += 1
while 1-Q(0): L += 1
for _ in range((N-D)%L): Q(0)
print('ASK GABBY')