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();
    }
}

package com.jam.google;

import java.util.List;

public class RecycledNumbers {

  public int count(int a, int b) {
    int pairCount = 0;
    for (int i = a; i <= b; i++) {
      int candidate = i;
      int j = 1;
      while( (candidate = recycle(i,j++) ) != i) {
        if (candidate > i && candidate <=b)
          pairCount++;
      }
    }
    return pairCount;
  }

  public int recycle(int i, int offset) {
    String string = String.valueOf(i);
    int answer = i;
    if (string.length()>1) {
      String recycledString = string.substring(string.length()-offset) + string.substring(0, string.length()-offset);
      answer = Integer.parseInt(recycledString);
    }
    return answer;
  }

  public void test() {
    InputUtil util = new InputUtil();
//    List<String> lines = util.readFile("test1.txt");
    List<String> lines = util.readFile("C-large.in");
//    int N = Integer.parseInt(lines.remove(0));
    int i = 1;
    for (String string : lines) {
      String[] split = string.split(" ");
      int count = count(Integer.parseInt(split[0]), Integer.parseInt(split[1]));
      System.out.println("Case #"+(i++)+": "+count);
    }
    
  }

  
}
