C1111233131211111211113313331333133313232321333133313311232133231   >>    C111123313121111121111331333133313331323232133313331331123213323   <<    C1111233131211111211113313331333133313232321333133313311232133233   >>      C1111233131211111211113313331333133313232321333133313311232133232   >>