C12121212311232322331313232233132313331323331323223313231323132313123111   >>    C1212121231123232233131323223313231333132333132322331323132313231312311   <<    C12121212311232322331313232233132313331323331323223313231323132313123113   >>      C12121212311232322331313232233132313331323331323223313231323132313123112   >>