C11111333133313232233133313331333132313231121133132313232112312111   >>    C1111133313331323223313331333133313231323112113313231323211231211   <<    C11111333133313232233133313331333132313231121133132313232112312113   >>      C11111333133313232233133313331333132313231121133132313232112312112   >>