#include<bits/stdc++.h> using namespace std; const int N=1e4+10; int n,a[N],b[N],c[N]; int main(){ scanf("%d",&n); for(int i=1;i<=n;i++){ scanf("%d%d%d",&a[i],&b[i],&c[i]); } for(int i=1;i<=n;i++){ int sum1=0,sum2=0; for(int j=1;j<=n;j++){ if(a[j]<a[i]&&b[j]<b[i]&&c[j]>b[i]){ if(a[sum1]<a[j]){ sum1=j; } } } printf("%d ",sum1); for(int j=1;j<=n;j++){ if(a[j]<a[i]&&b[j]<c[i]&&c[j]>c[i]){ if(a[sum2]<a[j]){ sum2=j; } } } printf("%d\n",sum2); } return 0; }