C12121212311232322331313232233132313331323221333132313311232221   >>    C1212121231123232233131323223313231333132322133313231331123222   <<    C12121212311232322331313232233132313331323221333132313311232223   >>      C12121212311232322331313232233132313331323221333132313311232222   >>