C1111233131211111211113313331333133313232321333133313331331123313222311   >>    C111123313121111121111331333133313331323232133313331333133112331322231   <<    C1111233131211111211113313331333133313232321333133313331331123313222313   >>      C1111233131211111211113313331333133313232321333133313331331123313222312   >>