#include <iostream>
using namespace std;

int main() {
    int n, m;
    int cup[4]{};
    cin >> n >> m;
    cup[n] = 1;
    for (int i = 0; i < m; i++) {
        int p, q;
        cin >> p >> q;
        swap(cup[p],cup[q]);
    }
    for (int i = 1; i <= 3; i++) {
        if (cup[i] == 1)
            cout << i << endl;
    }
    return 0;
}