s/^/====!=  =!      !=  =!===!/
s/!/=\n=/g
/4/s/./&&&&/g
/3/s/./&&&&&&&&&&&&&/g
:1
s/\(.*\n\)\n/\1\1/m
t1
:
s/=/Ea/
s//st/
s//er/
s//he/
s//gg/
t
s/\w*$//