C11111333133313232233133313331333132313232233132233131232311211   >>    C1111133313331323223313331333133313231323223313223313123231121   <<    C11111333133313232233133313331333132313232233132233131232311213   >>      C11111333133313232233133313331333132313232233132233131232311212   >>