C1111233131211111211113313331333133313232321333133313331311233132333132233311   >>    C111123313121111121111331333133313331323232133313331333131123313233313223331   <<    C1111233131211111211113313331333133313232321333133313331311233132333132233313   >>      C1111233131211111211113313331333133313232321333133313331311233132333132233312   >>