#include<bits/stdc++.h>
#include<unordered_map>
#include"grader.h"
#define rep(i,a,b) for(int i=int(a);i<int(b);i++)
#define rrep(i,a,b) for(int i=int(a);i>int(b);i--)
#define all(v) v.begin(),v.end()
#define trav(a,v) for(auto&a:v)
#define sz(a) a.size()
typedef long double ld;
using namespace std;
static const long long inf = 1e15;
typedef long long ll;
typedef unsigned long long ull;
void play(){
vector<string> v(50);
rep(i, 0, 50)v[i] = faceup(i+1);
vector<bool> done(50);
rep(i, 0, 50) {
if (done[i])continue;
rep(j, 0, 50) {
if (j == i)continue;
if (v[i] == v[j]) {
faceup(i + 1);
faceup(j + 1);
done[j] = 1;
break;
}
}
}
}
