:
/.../!s/^/0/
t
y/0123456789/123456789!/
s/\w/&=/g
s/=!/!==========/
t
s/.\{43\}/RKRNNQBX/
:2
s/X====/=X/
s/B====/-B/
s/Q------/-Q/
t2
s/N-/-N/
s/N--/-N/
s/N---/-N/
s/=/--/g
:3
s/\(.\)\(.-*\)-/\2\1/
s/X-*B/&-/
t3
y/X/B/
Note that non-ascii characters in the above source code will be escaped (such as \x9f).