import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

import java.util.*;

public class RecycledNumbers
{
  public static void main(String []args)
  {
    Scanner in = new Scanner(System.in);
    int T = in.nextInt();
    for(int i = 1; i <= T; i++)
    {
      System.out.print("Case #" + i + ": ");
      int A = in.nextInt();
      int B = in.nextInt();
      int count = 0;
      int n = 0;
      int t = A;
      while(t > 0) { t /= 10; n++; }
      boolean []b = new boolean[B + 1];
      for(int j = A; j <= B; j++)
      {
        int cycle = 0;
        for(int k = 0; k < n; k++)
        {
          t = rotate(j, n, k);
          if(A > t || t > B) continue;
          if(!b[t]) { b[t] = true; cycle++; }
        }
        count += cycle * (cycle - 1) / 2;
      }
      System.out.print(count);
      if(i < T) System.out.println();
    }
  }
  
  public static int rotate(int n, int size, int r)
  {
    int p = 1;
    for(int i = 0; i < r; i++) p *= 10;
    int cp = 1;
    for(int i = 0; i < size - r; i++) cp *= 10;
    return n % p * cp + n / p;
  }
}