s/^/-/
h
y/-/"/
G
s/\n/ : /
:1
y/-/=/
s/==/-/g
s/$/!!/
T
s/=!//
T1
:
s/0\?!\{10\}/!0/
t
s/-//
T2
s/!/!!/g
b
:2
s/[!"]/<123456789!01>/
s/\(.\?\)<.*\1\(!*.\).*>/\2/
t2
p
/480/d
G
D