supplied

x x ' ’ . a a a a a a a a

add

a a a a a a a a a a

del

a a a a a

subst

ab ba

sic/corr, orig/reg, choice, unclear

a a a a a a a a abc ab ba ab ba

abbr

a a a abc auggusti duo

seg

a a a

Peculiar case for seg[gap]: foobar.