C1111233131211111211113313331333133313331311323323133313232233111   >>    C111123313121111121111331333133313331333131132332313331323223311   <<    C1111233131211111211113313331333133313331311323323133313232233113   >>      C1111233131211111211113313331333133313331311323323133313232233112   >>