// https://oj.uz/problem/view/NOI19_charges
#include<bits/stdc++.h>
using namespace std;
#define int long long
#define pii pair<int ,int>
signed main(){
int n , q;
cin >> n >> q;
vector<char> ans(n + 10, '?');
while(q--){
char t;
cin>>t;
int u , v;cin>>u>>v;
if(v == 1) swap(u , v);
if(t == 'A'){
ans[v] = 'A';
}
else if(t == 'R'){
ans[v] = 'R';
}
else{
cout << ans[v] << "\n";
}
}
}
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