C11111333133313232233133313331333133313231312111113113313231323211221   >>    C1111133313331323223313331333133313331323131211111311331323132321122   <<    C11111333133313232233133313331333133313231312111113113313231323211223   >>      C11111333133313232233133313331333133313231312111113113313231323211222   >>