perl -lne 'sub out {print $h, "\n", scalar keys %c if %c }
           />/ and do { out(); %c =(); $h = $_ }
               or $c{$_}++;
           END { out() }' < input-file


##</code><code>##

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,