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

void main(void) {
    long long int n = 0;
    scanf("%lld",&n);
    int appearance[1000] = {};
    for(int i = 0 ; i < n ; i++){
        char str[2000] = "a";
        scanf("%s",str);
        appearance[(int)strlen(str)-3]++;
    }
    int max = 0;
    for(int i = 1 ; i < 1000;i++){
        if(appearance[max] <= appearance[i] ){
            max = i ;
        }
    }
    printf("%d",max+1);
}