C1111233131211111211113313331333133313331333133313331333132333132212121   >>    C111123313121111121111331333133313331333133313331333133313233313221212   <<    C1111233131211111211113313331333133313331333133313331333132333132212123   >>      C1111233131211111211113313331333133313331333133313331333132333132212122   >>