C1212122313132322331313232233132313231311112231323132313232212111   >>    C121212231313232233131323223313231323131111223132313231323221211   <<    C1212122313132322331313232233132313231311112231323132313232212113   >>      C1212122313132322331313232233132313231311112231323132313232212112   >>