C11111333133313232233133313331333133313331312111113231312323131   >>    C1111133313331323223313331333133313331333131211111323131232313   <<    C11111333133313232233133313331333133313331312111113231312323133   >>      C11111333133313232233133313331333133313331312111113231312323132   >>