#define _CRT_SECURE_NO_WARNINGS

#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <fstream>
#include <set>
#include <utility>
#include <algorithm>
#include <queue>
#include <stack>
#include <deque>
#include <numeric>
#include <sstream>
#include <list>
#include <map>

#define MAX(x,y) (x>y)?x:y
#define rep(i,p,n) for(int i=(int)p;i<(int)n;i++)
#define repp(i,p,n) for(int i=(int)p;i>=(int)n;i--)
#define Sort(x) sort(x.begin(),x.end());
#define ll long long 
#define INF 2000000000
#define MAX(x,y) (x>y)?x:y

using namespace std;
int main() {
	int n,maxx=0,maxnum=0;
	vector<int> v(1000, 0);
	cin >> n;
	rep(i, 0, n) {
		string s;
		cin >> s;
		v[s.length() - 2]++;
	}

	rep(i, 0, 1000) {
		if (maxx < v[i]) {
			maxx = v[i];
			maxnum = i;
		}
	}

	cout << maxnum << endl;
	
	


	return 0;
}