C11111333133313232233133313331333133313331113121111331323132212111   >>    C1111133313331323223313331333133313331333111312111133132313221211   <<    C11111333133313232233133313331333133313331113121111331323132212113   >>      C11111333133313232233133313331333133313331113121111331323132212112   >>