C11112331312111112111133132313331333133313233313331312111133133313223313111231   >>    C1111233131211111211113313231333133313331323331333131211113313331322331311123   <<    C11112331312111112111133132313331333133313233313331312111133133313223313111233   >>      C11112331312111112111133132313331333133313233313331312111133133313223313111232   >>