C1111233131211111211113313331333133313332313113313331322331323331322233121   >>    C111123313121111121111331333133313331333231311331333132233132333132223312   <<    C1111233131211111211113313331333133313332313113313331322331323331322233123   >>      C1111233131211111211113313331333133313332313113313331322331323331322233122   >>