#include <bits/stdc++.h> using namespace std; const int x=1e4+10; int a[x],b[x],c[x]; int main(){ int n; cin>>n; for(int i=1;i<=n;i++) cin>>a[i]>>b[i]>>c[i]; for(int i=1;i<=n;i++){ int zuo,you; for(int j=1;j<=n;j++){ if(a[j]<a[i]&&b[j]<b[i]&&c[j]>b[i]) zuo=j; if(a[j]<a[i]&&b[j]<=c[i]&&c[j]>c[i]) you=j; } cout<<zuo<<" "<<you<<endl; } return 0; }