C1111233131211111211113313331333133313331333133313331333121111331323123233231   >>    C111123313121111121111331333133313331333133313331333133312111133132312323323   <<    C1111233131211111211113313331333133313331333133313331333121111331323123233233   >>      C1111233131211111211113313331333133313331333133313331333121111331323123233232   >>