"010110111011110" =~ /1+/g; 
       # Global means search for match from the 
       # beginning to the end of string. 
       # Last match should be "1111" at positions 
       # from somewhere >10 and >10+4,
       # but 
print "@LAST_MATCH_START|@LAST_MATCH_END\n";
       # don't say so.
       # It prints me "|\n"