import java.util.*;

public class Main {
    private static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) throws Exception {
        boolean[] b = new boolean[4];
        int n = sc.nextInt();
        b[n] = true;
        int m = sc.nextInt();
        for (int i = 0;i < m;i++) {
            int p = sc.nextInt();
            int q = sc.nextInt();
            boolean tmp = b[p];
            b[p] = b[q];
            b[q] = tmp;
        }
        for (int i = 1;i <= 3;i++) {
            if (b[i]) System.out.println(i);
        }
    }
}