#include <bits/stdc++.h>
using namespace std;
int main(){
  int T;
  cin >> T;
  for (int i = 0; i < T; i++){
    long long N, K;
    cin >> N >> K;
    string S = to_string(K);
    int L = S.size();
    string T = to_string(N);
    int L2 = T.size();
    vector<long long> TEN(L2);
    TEN[0] = 1;
    for (int j = 0; j < L2 - 1; j++){
      TEN[j + 1] = TEN[j] * 10;
    }
    long long ans = 0;
    long long x = 0;
    for (int j = 0; j < L; j++){
      if (j > 0){
        ans++;
      }
      for (int k = 0; k < S[j] - '0'; k++){
        if (!(j == 0 && k == 0)){
          long long y = x * 10 + k;
          for (int l = 0; j + 1 + l <= L2; l++){
            long long mn = y * TEN[l];
            long long mx = (y + 1) * TEN[l] - 1;
            mx = min(mx, N);
            ans += max(mx - mn + 1, (long long) 0);
          }
        }
      }
      x *= 10;
      x += S[j] - '0';
    }
    ans++;
    cout << ans << endl;
  }
}