in reply to Block Search
$_='abbbcddddfegrgrgddeeeeedd'; print+(@b=sort{(()=$b=~/./g)<=>(()=$a=~/./g)}/((.)\2+)/cg)[0] #62 [download]
# 1 2 3 4 #2345678901234567890123456789012345678901234567 print+(sort{$b=~y///c-$a=~y///c}/((.)\2*)/g)[0] [download]
-Blake