C11111333133313232233133313331333133313331312111133133313231333133311232322231   >>    C1111133313331323223313331333133313331333131211113313331323133313331123232223   <<    C11111333133313232233133313331333133313331312111133133313231333133311232322233   >>      C11111333133313232233133313331333133313331312111133133313231333133311232322232   >>