#include<bits/stdc++.h>
using namespace std;
int main(){
int m,i,a[210]={0};
	cin>>m;
	for(i=0;i<m;i++){
		cin>>a[i];
	}
		if(a[i]*a[i]%7!=1){
			cout<<i<<" ";
		}
	
	return 0;
}


/**************************************************************
	Problem: 1156
	User: linweilun
	Language: C++
	Result: Wrong Answer
****************************************************************/