C1111233131211111211113313331333133313232321333133313331323232113311   >>    C111123313121111121111331333133313331323232133313331333132323211331   <<    C1111233131211111211113313331333133313232321333133313331323232113313   >>      C1111233131211111211113313331333133313232321333133313331323232113312   >>