C11111211113313112113313331333133312111113331333133313331121212112211211   >>    C1111121111331311211331333133313331211111333133313331333112121211221121   <<    C11111211113313112113313331333133312111113331333133313331121212112211213   >>      C11111211113313112113313331333133312111113331333133313331121212112211212   >>