#include <stdio.h>
#include <string.h>
int main()
{
    int c[1001];
    memset(c,0,sizeof(int)*1001);
    int n;
    int max = 0;
    int index = 0;
    scanf("%d",&n);
    char s[1024];
    for (int i = 0;i < n;i++) {
        scanf("%s", &s);
        c[strlen(s)-2]++;
    }
    for (int i = 0;i < 1000;i++) {
        if (c[i] >= max) {
            index = i;
            max = c[i];
        }
    }
    printf("%d\n",index);
}