C1111233131211111211113313331333133313113313232112323223313223111   >>    C111123313121111121111331333133313331311331323211232322331322311   <<    C1111233131211111211113313331333133313113313232112323223313223113   >>      C1111233131211111211113313331333133313113313232112323223313223112   >>