C12121212311232322331313232233132313331323331323223313231211231   >>    C1212121231123232233131323223313231333132333132322331323121123   <<    C12121212311232322331313232233132313331323331323223313231211233   >>      C12121212311232322331313232233132313331323331323223313231211232   >>