#include <bits/stdc++.h>
using namespace std;
int a[1024], f[10010];
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  int n, l = INT_MAX, r = INT_MIN, cnt = 0, src, dst;
  cin >> n;
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
    ++f[a[i]];
  }
  for (int i = 0; i < 10001; ++i) {
    if (f[i]) ++cnt;
    if (cnt > 3) {
      cout << "Unrecoverable configuration.";
      return 0;
    }
  }
  if (cnt == 1) {
    cout << "Exemplary pages.";
    return 0;
  }
  for (int i = 0; i < n; ++i) {
    if (l > a[i]) {
      l = a[i];
      src = i + 1;
    }
    if (r < a[i]) {
      r = a[i];
      dst = i + 1;
    }
  }
  int dif = r - l;
  if (dif % 2) {
    cout << "Unrecoverable configuration.";
    return 0;
  }
  dif /= 2;
  if (n == 2) {
    cout << dif << " ml. from cup #" << src << " to cup #" << dst << ".\n";
    return 0;
  }
  for (int i = 0; i < n; ++i) {
    if (i != src - 1 && i != dst - 1) {
      if (l + dif != a[i] || r - dif != a[i]) {
        cout << "Unrecoverable configuration.";
        return 0;
      }
    }
  }
  cout << dif << " ml. from cup #" << src << " to cup #" << dst << ".\n";
  return 0;
}
