#include "grader.h"
#include "memory.h"
#include <bits/stdc++.h>
using namespace std;
void play() {
map<char, int> pos1, pos2;
vector<bool> did(25, false);
for(int i=0;i<25;++i) {
char a = faceup(2 * i), b = faceup(2 * i + 1);
if(a == b) {
did[a - 'A'] = true;
} else {
if(pos1.find(a) == pos1.end()) {
pos1[a] = 2 * i;
} else {
pos2[a] = 2 * i;
}
if(pos1.find(b) == pos1.end()) {
pos1[b] = 2 * i + 1;
} else {
pos2[b] = 2 * i + 1;
}
}
}
for(int i=0;i<25;++i) {
if(!did[i]) {
faceup(pos1['A' + i]);
faceup(pos2['A' + i]);
}
}
}
