#include <bits/stdc++.h>
#include <iostream>
using namespace std;
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define rep(i,a,b) for(LL i = a;i<b; i++)
#define rrep(i,a,b) for(LL i = a;i>b; i--)
#define tobirep(i,a,b,c) for(LL i = a;i<b; i+=c)
#define tobirrep(i,a,b,c) for(LL i = a;i>b; i-=c)
#define INF ((1LL<<62)-(1LL<<31))
#define ooki 9223372036854775807
#define tii -9223372036854775808
typedef long long LL;
int main(){
   ios::sync_with_stdio(0);cin.tie(nullptr);
  LL n;
  cin >> n;
  vector<int> p(2000);
  rep(i,0,2000){p[i]=0;}
  rep(i,0,n){
    string s;
    cin >> s;
    p[s.size()-2]++;
  }
  LL ans = 0;
  LL d=0;
  rep(i,0,2000){
   if(p[i]>=d){
     d = p[i];
     ans = i; 
   }
  }
  cout << ans << endl;
  
      
    
    
    
    
    
}