#include <bits/stdc++.h>
#include "grader.h"
#include "memory.h"
using namespace std;
#define db long double
#define ll long long
#define pii pair<int, int>
#define pll pair<ll, ll>
#define vi vector<int>
#define vl vector<ll>
#define vii vector<pii>
#define vll vector<pll>
#define endl '\n'
#define all(x) x.begin(), x.end()
#define fastio\
ios_base::sync_with_stdio(0);\
cin.tie(0);\
cout.tie(0)\
map<char, pii> mp;
void play(){
for(int i = 1; i <= 50; i++){
char c = faceup(i);
if(mp[c].first == 0) mp[c].first = i;
else mp[c].second = i;
}
for(pair<char, pii> i : mp){
faceup(i.second.first);
faceup(i.second.second);
}
}
