#include<cstdio>

#include<cstdlib>

#include<vector>

using namespace std;

int n,a[1000010];

vector<int>b[1000010],c[1000010];

int main(){

	freopen("vier.in","r",stdin);

	freopen("vier.out","w",stdout);

	srand(233);

	scanf("%d",&n);

	for(int i=1;i<=n;++i){

		scanf("%d",&a[i]);

	}

	while(1){

		int A=rand()%n+1;

		int B=rand()%n+1;

		int t=(A+B+a[A]+a[B])%n;

		for(int i=0;i<b[t].size();++i){

			if((A+B)%n==(b[t][i]+c[t][i])%n && (a[A]+a[B])%n==(a[b[t][i]]+a[c[t][i]])%n && !(A==b[t][i] && B==c[t][i]) && !(A==c[t][i] && B==b[t][i])){

				puts("Ja");

				printf("%d %d %d %d\n",A,B,b[t][i],c[t][i]);

				return 0;

			}

		}

		b[t].push_back(A);

		c[t].push_back(B);

	}

	return 0;

}