#include <stdio.h>
#include <string.h>

void main(void) {
    long long int n = 0;
    scanf("%lld",&n);
    int appearance[1000] = {};
    int max = 0;
    for(int i = 0 ; i < n ; i++){
        char str[1050] = "a";
        scanf("%s",str);
        appearance[(int)strlen(str)-2]++;
        if(appearance[max] < appearance[(int)strlen(str)-2] 
        || appearance[max] == appearance[(int)strlen(str)-2] && max < (int)strlen(str)-2){
            max = (int)strlen(str)-2;
        }
    }
    printf("%d",max);
}