C11111211113313112113313331333133313331333121131211111133133313221233112233231   >>    C1111121111331311211331333133313331333133312113121111113313331322123311223323   <<    C11111211113313112113313331333133313331333121131211111133133313221233112233233   >>      C11111211113313112113313331333133313331333121131211111133133313221233112233232   >>