C1111233131211111211113313331333133313331333133313331333133313233111112121   >>    C111123313121111121111331333133313331333133313331333133313331323311111212   <<    C1111233131211111211113313331333133313331333133313331333133313233111112123   >>      C1111233131211111211113313331333133313331333133313331333133313233111112122   >>