/-/G
s//4294967296 /
:1
s/[1-9]/&_/g
y/123456789/012345678/
s/\(0_*\)\(_*\)\( .*\)\1\n/\3\n0\2/
s/_0\(_* \)/9_\1/
t1
/ /D
s/$/__!/
:
s/_\{31\}/=/
s/_\(0=*\)/\1__________/
t
s/_/_ABCDEFGHIJKLMNOPQRSTUVWXYZ/
s/_.*\(.\).\{29\}!/!\1/
y/=/_/
/_0/b
s/.*!//
Note that non-ascii characters in the above source code will be escaped (such as \x9f).