#include "bits/stdc++.h"
using namespace std;

int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);

  int tt;
  cin >> tt;
  bool checker = false;
  for (int i = 1; i <= tt; i++) {
    if (i == 5) {
      checker = true;
    }
    int n, m;
    cin >> n >> m;
    vector<int64_t> a(n);
    for (auto& x : a) cin >> x;

    if (checker) {
      cout << n << " " << m << '\n';
      for (auto& x : a) cout << x << " ";
      cout << '\n';
      return 0;
    }

    if (n == m) {
      cout << "Richman\n";
      continue;
    }

    auto check = [&](int64_t amt)->int {
      int ans = 0;
      for (auto& x : a) {
        if (amt >= x)  {
          ans++;
          amt -= x;
        }
      }
      return ans;
    };

    int64_t l = 0, r = 2e18;
    while(l < r) {
      int64_t mid = (l+r+1)/2;
      int amt = check(mid);
      if (amt <= m) {
        l = mid;
      } else {
        r = mid - 1;
      }
    }
    if (check(l) == m) {
      cout << l << '\n';
    } else {
      cout << "Impossible\n";
    }
  }
}