#!perl map$s{1,sort/./g}=~s/(.*} */1$1 $_/,sort<>;map{/11 /;print$'}sort%s
#!perl map$s{1,sort/./g}=~s/(.*) */1$1 $_/,sort<>;map{/11 /;print$'}sort%s
#!perl $p{1,sort/./g}=~s/(.*)\s*/0$1 $_/for sort<>;s/00+ //&&print for sort%p