C1111233131211111211113313331333133313331312331333133112112312131   >>    C111123313121111121111331333133313331333131233133313311211231213   <<    C1111233131211111211113313331333133313331312331333133112112312133   >>      C1111233131211111211113313331333133313331312331333133112112312132   >>