#include <bits/stdc++.h>
using namespace std;
signed main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  long long n;
  cin >> n;
  long long k, x;
  for (long long i = 0; i < n; ++i) {
    cin >> k >> x;
    cout << (k - 1) * 9 + x << "\n";
  }
  return 0;
}
