C11111333133313232233133313331333133313231312111133131321123211   >>    C1111133313331323223313331333133313331323131211113313132112321   <<    C11111333133313232233133313331333133313231312111133131321123213   >>      C11111333133313232233133313331333133313231312111133131321123212   >>