$ perl -e '$_="aaabbccccddeee"; print $1,$/ while /((.)\2*)/g'
#                                                  ^^
#                                                  ||
#                                                  |+--- \2
#                                                  |
#                                                  \1
aaa
bb
cccc
dd
eee

##</code><code>##

 push @array, $1 while  /((.)\2*)/g;

##</code><code>##

# THIS IS WRONG
@array = $_ =~ /((.)\2*)/g;
print join ", " , map {"<$_>"} @array;
__END__
<aaa>, <a>, <bb>, <b>, <cccc>, <c>, <dd>, <d>, <eee>, <e>