#include <bits/stdc++.h>
using namespace std;
int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long int t;
  cin >> t;
  while (t--) {
    long long int a, b;
    cin >> a >> b;
    long long int val = abs(a - b);
    long long int answer = val / 10;
    if (val % 10 != 0) answer++;
    cout << answer << endl;
  }
}
