C11112331312111112111133133313331333132313233313113313331333133112131211   >>    C1111233131211111211113313331333133313231323331311331333133313311213121   <<    C11112331312111112111133133313331333132313233313113313331333133112131213   >>      C11112331312111112111133133313331333132313233313113313331333133112131212   >>