:1
s/-*$/&\n&-/
/-\{12\}/!b1
s/.//
s/-*/ 00& 000&&/g
:2
s/\(--*\).* \(.*\)/& \2\1/mg
/-\{144\}/!b2
:
s/.-/&0123456789-0#/
s/\(.\)-.*\1\(-*.\).*#/\2/m
t
s/\b0/ /
t
Note that non-ascii characters in the above source code will be escaped (such as \x9f).