s/\W//g
H
s/^/H-O /
:
s/ 0\|-1/ H-O /
s/-0\| 1/-H O-/
t
s/ O-$//p
$d
g
1s/^/||||||/
:2
s/\(.\)\(.*\)\s\(.\)/\2\3-\1 /
s/0-\|-|//
s/1-1/|/
t2
s/\S/  & /g
h
y/1/ /
p
g
s//H/gp
g
s/ //g
x
y/|1/ |/