#include <iostream>
#include <string>

using namespace std;

int main() {
  int t;
  cin >> t;
  while (t--) {
    int x;
    cin >> x;
    string xstr = to_string(x);

    int res = 10;
    for (const char &i : xstr) {
      res = min(res, (int)(i - '0'));
    }
    cout << res << endl;
  }
}