#include <bits/stdc++.h>
using namespace std;
//#include <atcoder/all>
//using namespace atcoder;
using ll=long long;
using Graph=vector<vector<int>>;
#define MAX 1000000
#define MOD 1000000007
//#define MOD 998244353
#define INF 1000000000
//#define INF 1000000000000000000

int main(){
  int N,M;
  cin>>N>>M;
  vector<int> a(3,0);
  a[N-1]=1;
  for(int i=0;i<M;i++){
    int P,Q;
    cin>>P>>Q;
    P--;Q--;
    swap(a[P],a[Q]);
  }
  for(int i=0;i<3;i++){
    if(a[i]==1){
      cout<<i+1<<endl;
    }
  }
}