C11111333133313232233133313331333133313231312111113113313231333131121131212111   >>    C1111133313331323223313331333133313331323131211111311331323133313112113121211   <<    C11111333133313232233133313331333133313231312111113113313231333131121131212113   >>      C11111333133313232233133313331333133313231312111113113313231333131121131212112   >>