C12121212311232322331313232233132333132333132233132332313232211   >>    C1212121231123232233131323223313233313233313223313233231323221   <<    C12121212311232322331313232233132333132333132233132332313232213   >>      C12121212311232322331313232233132333132333132233132332313232212   >>