fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    let mut result: Vec<usize> = vec![0; 1000];
    for _ in 0..n {
        let mut s = String::new();
        std::io::stdin().read_line(&mut s).ok();
        let s: usize = s.trim().len() - 2;
        result[s] += 1;
    }
    let mut max_idx = 0;
    let mut max_val = 0;
    for pair in result.iter().enumerate().rev() {
        if max_val < *pair.1 {
            max_val = *pair.1;
            max_idx = pair.0;
        }
    }

    println!("{}", max_idx);
}