:
/.\{127\}/!s/0\|$/ 0 /
t
h
s/\>/.12345/g
:1
s/00/=/g
s/=*0\(.\)\w*/\1/g
s/=[^=]\?/0/g
t1
p
g
s/0\{64\}\?\(0*\) /\1 \1/g
T
s/^ //
t
d