#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define fi first
#define se second
#define file(name) if(fopen(name".inp", "r")) {freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout);}
#include "grader.h"
#include"memory.h"
void play()
{
int couple[25];
for(int i = 0; i < 25; ++i) couple[i] = -1;
for(int i = 1; i <= 50; ++i)
{
char c;
c = faceup(i);
int base = int(c) - 'A';
if(couple[base] > -1) faceup(couple[base]);
else
{
couple[base] = i;
faceup(i + 1);
}
}
}
