C1212121231123232233131323223313231323331323221331123231323132313232111   >>    C121212123112323223313132322331323132333132322133112323132313231323211   <<    C1212121231123232233131323223313231323331323221331123231323132313232113   >>      C1212121231123232233131323223313231323331323221331123231323132313232112   >>