C111123313331323113313331333133313331323131211113313331322212233231   >>    C11112331333132311331333133313331333132313121111331333132221223323   <<    C111123313331323113313331333133313331323131211113313331322212233233   >>      C111123313331323113313331333133313331323131211113313331322212233232   >>