#include <bits/stdc++.h>
using namespace std;
int n, m, a[100010], pos[100010], f[100010], b;
int main() {
  bool yes = true;
  cin >> n >> m;
  for (int i = 1; i < n + 1; i++) {
    cin >> f[i];
    if (pos[f[i]]) {
      pos[f[i]] = -1;
    } else {
      pos[f[i]] = i;
    }
  }
  for (int i = 0; i < m; i++) {
    cin >> b;
    if (!pos[b]) {
      cout << "Impossible" << endl;
      return 0;
    } else if (pos[b] == -1) {
      yes = false;
    }
    a[i] = pos[b];
  }
  if (yes == false) {
    cout << "Ambiguity" << endl;
    return 0;
  } else {
    cout << "Possible" << endl;
    for (int i = 0; i < m; i++) {
      cout << a[i] << " ";
    }
    cout << endl;
  }
}
