C121212231313232233131323223313231323132313331323131133132313232212121   >>    C12121223131323223313132322331323132313231333132313113313231323221212   <<    C121212231313232233131323223313231323132313331323131133132313232212123   >>      C121212231313232233131323223313231323132313331323131133132313232212122   >>