#include "grader.h"
#include "memory.h"
#include <bits/stdc++.h>
#define ll long long int
#define pb push_back
#define mp make_pair
#define FOR(i,n) for(i=0;i<(n);++i)
#define FORe(i,n) for(i=1;i<=(n);++i)
#define FORr(i,a,b) for(i=(a);i<(b);++i)
#define FORrev(i,n) for(i=(n);i>=0;--i)
#define ii pair<ll,ll>
#define vi vector<ll>
#define vii vector<ii>
#define ff first
#define ss second
#define cd complex<double>
#define vcd vector<cd>
#define ldd long double
#define all(x) (x).begin(),(x).end()
using namespace std;
void play()
{
int i,j,posA[25],posB[25];
FORe(i,50)
{
j = faceup(i) - 'A';
posA[j] = posB[j];
posB[j] = i;
}
FOR(i,25)
{
faceup(posA[i]);
faceup(posB[i]);
}
}
