C11111211113313112113313331333133313331333121131211113322332321   >>    C1111121111331311211331333133313331333133312113121111332233232   <<    C11111211113313112113313331333133313331333121131211113322332323   >>      C11111211113313112113313331333133313331333121131211113322332322   >>