#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

void solve() {
  string s;
  cin >> s;
  int n = s.size();
  for (int i = 0; i < n - 1; ++i) {
    int m = s.size();
    string tmp = "";
    for (int j = 0; j < m - 1; ++j) {
      int left = s[j] - '0';
      int right = s[j + 1] - '0';
      int t = left + right;
      if (t >= 10) {
	t = (t % 10) + (t / 10);
      }
      tmp += (char)(t + '0');
    }
    s = tmp;
  }
  cout << s << '\n';
}

int main() {
  int t;
  cin >> t;
  while (t--) solve();
  return 0;
}