s/$/-\n!!=====/
s/=/====/g
h
:
s/-\(.*\n\(!*\)=\)/\2\1/
t
s/^\B/0/
s/0!\{10\}/!0/
t
:3
s/\(0!*\)!/\1-/
t3
s/=//
t
s/0/ 0123456789/g
s/ \w*\(\w\)\S\{9\}/\1/g
s/.*/&----- &/m
:7
s/-/ /
s/\w //
t7
P
g
s/=/!/
h
t
d
Note that non-ascii characters in the above source code will be escaped (such as \x9f).