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

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

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