C11111333133313232233133313331333133313331312111133133313231333133311222121   >>    C1111133313331323223313331333133313331333131211113313331323133313331122212   <<    C11111333133313232233133313331333133313331312111133133313231333133311222123   >>      C11111333133313232233133313331333133313331312111133133313231333133311222122   >>