#include <bits/stdc++.h>
using namespace std;
vector<int> v;
const char nl = '\n';
string solve1(string s, int n) {
  string t;
  for (char c = '1'; c <= '9'; c++) {
    t = string(n, c);
    if (t >= s) break;
  }
  return t;
}
string solve2(string s, int n) {
  string res = solve1(s, n);
  for (char a = '0'; a < '9'; a++) {
    for (char b = a + 1; b <= '9'; b++) {
      bool only_ab = true;
      for (int i = 0; i < n; i++) {
        if (s[i] < b) {
          string t = s;
          if (s[i] < a)
            t[i] = a;
          else
            t[i] = b;
          for (int k = i + 1; k < n; k++) t[k] = a;
          if (t < res) res = t;
        }
        if (s[i] != a && s[i] != b) {
          only_ab = false;
          break;
        }
      }
      if (only_ab) return s;
    }
  }
  return res;
}
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, k, t;
  cin >> t;
  while (t--) {
    string s;
    int k;
    cin >> s >> k;
    int n = s.length();
    k == 1 ? cout << solve1(s, n) : cout << solve2(s, n);
    cout << nl;
  }
}
