C121212123112323223313132322331323133313232213331323133112122311   >>    C12121212311232322331313232233132313331323221333132313311212231   <<    C121212123112323223313132322331323133313232213331323133112122313   >>      C121212123112323223313132322331323133313232213331323133112122312   >>