#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;
}