//Pawel Kalinowski

#include <iostream>

using namespace std;

int main()
{

	int tablica[19];
	int n = 0;
	int ind = 0;

	for (int i = 0; i < 4; i++)
	{
		cin >> tablica[i];
	}

	cin >> n;

	for (int i = 0; i < 4; i++)
	{
		if (tablica[i] == n)
		{
			ind == i;
			cout << i;
			return 0;
		}
		else
		{
			cout << "NIE MA";
		}

	}


	return 0;
}