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.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;


public class Recycled {
  public static void main(String[] args) {
    try {
      File input = new File("/Users/mtervahauta/Dev/mikkot/codejam/recycled.input");
      //File input = new File(args[0]);
      FileInputStream fStream = new FileInputStream(input);
      BufferedReader bReader = new BufferedReader(
          new InputStreamReader(fStream));
      int cases = Integer.parseInt(bReader.readLine());
      for (int i = 1; i <= cases; i++) {
        String[] values = bReader.readLine().trim().split(" ");
        solveRecycled(i, values[0], values[1]);
      }
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
  
  private static void solveRecycled(int caseNo, String aStr, String bStr) {
    long a = Long.parseLong(aStr);
    long b = Long.parseLong(bStr);
    //Set<String> nms = new HashSet<String>();
    long count = 0;
    for (long n = a; n <= b; n++) {
      count = findM(count, a, n, b);
    }
    System.out.println("Case #" + caseNo + ": " + count);
  }

  private static long findM(long count, long a, long n, long b) {
    List<Long> recycledValues = recycledStrings(Long.toString(n));
    Set<String> nms = new HashSet<String>();
    for (Long recycledN : recycledValues) {
      long m = recycledN.longValue();
      if (n < m && m <= b) {
        nms.add(n+":"+m);
      }
    }
    return count + nms.size();
  }

  private static List<Long> recycledStrings(String src) {
    List<Long> resp = new ArrayList<Long>();
    int length = src.length();
    String recycled = null;
    for (int i = 1; i < length; i++) {
      recycled = src.substring(length - i);
      recycled = recycled + src.substring(0, length - i);
      if (!recycled.startsWith("0"))
        resp.add(new Long(Long.parseLong(recycled)));
    }
    return resp;
  }
 }