C1111233131211111211113313331333133313232313331333133112323213221   >>    C111123313121111121111331333133313331323231333133313311232321322   <<    C1111233131211111211113313331333133313232313331333133112323213223   >>      C1111233131211111211113313331333133313232313331333133112323213222   >>