#include<bits/stdc++.h>
using namespace std;
typedef pair<int,int> pii;
inline int ask(int u,int v){
  cout<<"? "<<u+1<<' '<<v+1<<endl;
  char c; cin>>c; return c=='R';
}
int main(){
  ios::sync_with_stdio(false);
  int n; cin>>n;
  vector<int> r,b;
  vector<pii> R,B;
  for(int i=1;i<n;i++){
    if(ask(0,i)){
      r.emplace_back(i);
      R.emplace_back(0,i);
    }
    else{
      b.emplace_back(i);
      B.emplace_back(0,i);
    }
  }
  for(int i=0,j=0;i<R.size()&&j<B.size();){
    if(ask(r[i],b[j]))R.emplace_back(r[i],b[j++]);
    else B.emplace_back(r[i++],b[j]);
  }
  if(R.size()==n-1){
    cout<<"!\n";
    for(auto [u,v]:R)
      cout<<u+1<<' '<<v+1<<'\n';
    cout<<endl;
  }
  else{
    cout<<"!\n";
    for(auto [u,v]:B)
      cout<<u+1<<' '<<v+1<<'\n';
    cout<<endl;
  }
  return 0;
}