C1111233131211111211113313331333133313331333133313331333133313233121121311   >>    C111123313121111121111331333133313331333133313331333133313331323312112131   <<    C1111233131211111211113313331333133313331333133313331333133313233121121313   >>      C1111233131211111211113313331333133313331333133313331333133313233121121312   >>