//#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
//using namespace atcoder;
using ll = long long;
#define all(A) A.begin(),A.end()
using vll = vector<ll>;
#define rep(i, n) for (long long i = 0; i < (long long)(n); i++)
using Graph = vector<vector<ll>>;
Graph G;
vll dist;
vector<bool> seen;
ll gcd(ll(a), ll(b)) {
	ll c = a;
	while (a % b != 0) {
		c = a % b;
		a = b;
		b = c;
	}
	return b;
}
int main() {
	ll N,M;
	cin>>N>>M;
	vector<bool> AN(4,false);
	AN[N]=true;
	rep(i,M){
		ll A,B;
		string R;
		cin>>A>>B;
		swap(AN[A],AN[B]);

	}
	rep(i,4){
		if(AN[i])cout<<i<<endl;
	}
	
}