#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
  #include "settings/debug.cpp"
  #define _GLIBCXX_DEBUG
#else
  #define Debug(...) void(0)
#endif
#define rep(i, n) for (int i = 0; i < (n); ++i)
using ll = long long;
using ull = unsigned long long;

int main() {
  int n, m;
  cin >> n >> m;
  vector<bool> a(3);
  a[n - 1] = true;
  while (m--) {
    int p, q;
    cin >> p >> q;
    swap(a[p - 1], a[q - 1]);
  }
  rep(i, 3) {
    if (a[i]) cout << i + 1 << endl;
  }
  return 0;
}