#include <bits/stdc++.h>
using namespace std;
int Query(const std::vector<int> &p);
void Answer(int a, int b);
void Solve(int N) {
int n = N;
vector<vector<int>> adj(2*n+1);
set<pair<int,int>> edges;
for(int i=1;i<=2*n;i++){
for(int j=i+1;j<=2*n;j++){
if(Query({i,j})==1){
edges.insert({i,j});
adj[i].emplace_back(j);
adj[j].emplace_back(i);
}
}
}
for(int i=1;i<=2*n;i++){
assert(adj[i].size()==3);
if(Query({i,adj[i][0],adj[i][1]})==1)edges.erase({min(i,adj[i][2]),max(i,adj[i][2])});
else if(Query({i,adj[i][0],adj[i][2]})==1)edges.erase({min(i,adj[i][1]),max(i,adj[i][1])});
else edges.erase({min(i,adj[i][0]),max(i,adj[i][0])});
}
for(auto[a,b]:edges)Answer(a,b);
}
