#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  int n, m;
  cin >> n >> m;
  vector<int> cnt(n + 1, false), idx(n + 1), ans(m + 1), b(m + 1);
  for (int i = 1; i <= n; i++) {
    int x;
    cin >> x;
    cnt[x]++;
    idx[x] = i;
  }
  for (int i = 1; i <= m; i++) {
    cin >> b[i];
    if (!cnt[b[i]]) {
      cout << "Impossible" << endl;
      return 0;
    }
  }
  for (int i = 1; i <= m; i++) {
    if (cnt[b[i]] > 1) {
      cout << "Ambiguity" << endl;
      return 0;
    }
    ans[i] = idx[b[i]];
  }
  cout << "Possible" << endl;
  for (int i = 1; i <= m; i++) cout << ans[i] << " ";
  cout << endl;
  return 0;
}
