C11111211113313112113313331333133312111113331333133313331121212121231   >>    C1111121111331311211331333133313331211111333133313331333112121212123   <<    C11111211113313112113313331333133312111113331333133313331121212121233   >>      C11111211113313112113313331333133312111113331333133313331121212121232   >>