#include <iostream>
#include <cstdio>
#include <vector>
#include <algorithm>
#include <utility>

using namespace std;

int main() {
	int n, m;
	bool cup[4] = {false};

	cin >> n >> m;
	cup[n] = true;
	int p, q;
	for (int i = 0; i < m; i++) {
		cin >> p >> q;
		swap(cup[p], cup[q]);
	}

	for (int i = 1; i <= 3; i++) {
		if (cup[i]) {
			cout << i << endl;
		}
	}
	return 0;
}