C1111233131211111211113313331333133313232321333133313331311233121133121   >>    C111123313121111121111331333133313331323232133313331333131123312113312   <<    C1111233131211111211113313331333133313232321333133313331311233121133123   >>      C1111233131211111211113313331333133313232321333133313331311233121133122   >>