#include<bits/stdc++.h>
using namespace std;
int n,a[100005];
int main()
{
	cin>>n;
	for(int i=1;i<=n;i++)cin>>a[i];
	int cnt=0;
	while(1)
	{
		int pre=-1e9;
		for(int i=1;i<=n;i++)
		{
			if(a[i]!=pre&&a[i]!=-1)
			{
				cout<<i<<" ";
				pre=a[i];
				cnt++;
				a[i]=-1;
			}
		}
		cout<<endl;
		if(cnt==n)break;
	}
	
	return 0;
}