C1111233131211111211113313331333133313331333133313331333133313233121311311   >>    C111123313121111121111331333133313331333133313331333133313331323312131131   <<    C1111233131211111211113313331333133313331333133313331333133313233121311313   >>      C1111233131211111211113313331333133313331333133313331333133313233121311312   >>