#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define pp pop_back
#define ll long long
#define pb push_back
#define pq priority_queue
#define ls(v) (int)v.size()
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define wr cout << "------------------------" << endl
#define tt debug
signed main(){
#ifdef parad0x
freopen("file.in","r",stdin);
#endif
#define print(...) 42
ios::sync_with_stdio(false);cin.tie(nullptr);
int n;
cin >> n;
for(int i = 1;i<n;++i){
int a,b;
cin >> a >> b;
}
queue<int>q;
for(int i = 1;i<=n;++i)
q.push(i);
for(int i = 1;i<=n;++i){
for(int j = 1;j<=n;++j){
cout << q.front() << ' ';
q.push(q.front());
q.pop();
}
q.push(q.front());
q.pop();
cout << endl;
}
return 0;
}
