C12121212311232322331313232233132333132333132233131323331323133313112121   >>    C1212121231123232233131323223313233313233313223313132333132313331311212   <<    C12121212311232322331313232233132333132333132233131323331323133313112123   >>      C12121212311232322331313232233132333132333132233131323331323133313112122   >>