C11111333133313232233133313331333133313231312111133131323211121   >>    C1111133313331323223313331333133313331323131211113313132321112   <<    C11111333133313232233133313331333133313231312111133131323211123   >>      C11111333133313232233133313331333133313231312111133131323211122   >>