#include <bits/stdc++.h>
using namespace std;
using ll = long long;
int n, m, chk[100100], a[100100], b[100100];
vector<int> v[100100];
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cin >> n >> m;
  for (int i = 1; i <= m; i++) {
    int a, b;
    cin >> a >> b;
    v[a].push_back(b), v[b].push_back(a);
  }
  for (int i = 1; i <= n; i++)
    if (v[i].size() != n - 1) {
      chk[i] = 1;
      for (int x : v[i]) chk[x] = 1;
      int j = 1, c = 0;
      while (chk[j]) j++;
      for (int k = 1; k <= n; k++)
        if (k != i && k != j) a[k] = b[k] = ++c;
      a[i] = b[i] = b[j] = ++c;
      a[j] = ++c;
      cout << "YES\n";
      for (int i = 1; i <= n; i++) cout << a[i] << " ";
      cout << "\n";
      for (int i = 1; i <= n; i++) cout << b[i] << " ";
      cout << "\n";
      return 0;
    }
  cout << "NO";
}
