C12121212311232322331313232233132333132333132112323132313231221   >>    C1212121231123232233131323223313233313233313211232313231323122   <<    C12121212311232322331313232233132333132333132112323132313231223   >>      C12121212311232322331313232233132333132333132112323132313231222   >>