C11111211113313112113313331333133313331312111133223313331311212121   >>    C1111121111331311211331333133313331333131211113322331333131121212   <<    C11111211113313112113313331333133313331312111133223313331311212123   >>      C11111211113313112113313331333133313331312111133223313331311212122   >>