#include<bits/stdc++.h>
#define MAX_N 100001
#define INF_INT 2147483647
#define INF_LL 9223372036854775807
#define REP(i,n) for(int i=0;i<(int)(n);i++)
using namespace std;
typedef long long int ll;
typedef pair<ll,ll> P;

int main()
{
  int N,me[1001] = {0},ma=-1,ind;
  string S;
  cin >> N;
  REP(i,N){
    cin >> S;
    me[S.size()-2]++;
  }
  REP(i,1001)if(ma <= me[i]){
    ma = me[i];
    ind = i;
  }
  cout << ind << endl;
    
  return 0;
}