#include <stdio.h>

int main(void) {
    int i, N, M, cup[4] = {0}, P, Q, tmp;

    scanf("%d", &N);
    cup[N] = 1;
    scanf("%d", &M);
    for(i = 1;i <= M;i++){
        scanf("%d%d", &P, &Q);
        tmp = cup[P];
        cup[P] = cup[Q];
        cup[Q] = tmp;
    }
    for(i = 1;i <= 3;i++){
        if(cup[i] == 1)printf("%d\n", i);
    }

    return 0;
}