C1111233131211111211113313331333131211111132233133313331323131323331323211   >>    C111123313121111121111331333133313121111113223313331333132313132333132321   <<    C1111233131211111211113313331333131211111132233133313331323131323331323213   >>      C1111233131211111211113313331333131211111132233133313331323131323331323212   >>