#include "memory.h"
#include "grader.h"
#include <stdio.h>
#include <stdlib.h>
#include<bits/stdc++.h>
#define INF 1e18
#define fi first
#define se second
#define FOR(i, k, n) for(ll i = k; i <= n; i++)
#define FOR1(i, k, n) for(ll i = k; i >= n; i--)
#define pb push_back
#define fastio ios::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define vi vector<int>
#define pii pair<int, int>
#define vii vector<pii>
#define ll long long
#define vll vector<ll>
#define pll pair<ll, ll>
#define re return 0
#define mii map<int, int>
#define input "chinaflu.inp"
#define output "chinaflu.out"
#define rf freopen(input, "r", stdin); freopen(output, "w", stdout)
using namespace std;
const int maxn = 1e5 + 5;
const int mod = 1e9 + 9;
const int base = 998244353;
void add(int &a, int b)
{
a += b;
if(a >= mod) a -= mod;
if(a < 0) a += mod;
}
mt19937 rd(chrono::steady_clock::now().time_since_epoch().count());
int rand(int l, int r)
{
return uniform_int_distribution<int>(l, r) (rd);
}
vi vv[100];
void play()
{
FOR(i, 0, 50)
vv[i].clear();
for(int i = 1; i <= 50; i += 2)
{
char c = faceup(i);
vv[c - 'A'].pb(i);
c = faceup(i + 1);
vv[c - 'A'].pb(i + 1);
}
FOR(i, 0, 30)
if(vv[i].size() < 2)
continue;
else
{
faceup(vv[i][0]);
faceup(vv[i][1]);
}
return;
}
