C11111333133313232233133313331333133313221333133313231323211111   >>    C1111133313331323223313331333133313331322133313331323132321111   <<    C11111333133313232233133313331333133313221333133313231323211113   >>      C11111333133313232233133313331333133313221333133313231323211112   >>