post
ABCD
ABCDABCDEABCDEABCDE
post
BBBB
...................
post
abde
abdefgjiklmnopqrstu
post
acde
ACDEFGHIJKLMNOPQRST
post
OOOO
bcdefghijklmnopqrst
post
nnnn
,,,,,aaaaa.....____
post
nnn_
...................
post
A__C
A__C_D_E_F_G_H_U_J.
post
uuuu
zzzzzzzzzXXXXXXXXXX
post
zzzz
ZZZZZZZZZZUUUUUUUXY
exit
