C1111233131211111211113313331333133313232321333133313331333133112111113113111   >>    C111123313121111121111331333133313331323232133313331333133313311211111311311   <<    C1111233131211111211113313331333133313232321333133313331333133112111113113113   >>      C1111233131211111211113313331333133313232321333133313331333133112111113113112   >>