C1111233131211111211113313331333133313331333133313331333133313233311223311   >>    C111123313121111121111331333133313331333133313331333133313331323331122331   <<    C1111233131211111211113313331333133313331333133313331333133313233311223313   >>      C1111233131211111211113313331333133313331333133313331333133313233311223312   >>