import java.io.File;
import java.io.FileNotFoundException;
import java.io.PrintWriter;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;
import java.util.Set;

public class CopyOfCopyOfMain {

	static int ndigits(int n) {
		return (int) (Math.log10(n) + 1);
	}

	static int rot(int n, int dig) {
		return (int) ((n % 10) * Math.pow(10, dig - 1)) + (int) (n / 10);
	}

	public static void main(String[] args) throws FileNotFoundException {
		String file = "C-large";
		Scanner in = new Scanner(new File(file + ".in"));
		PrintWriter out = new PrintWriter(new File(file + ".out"));

		int T = in.nextInt();
		for (int t = 1; t <= T; t++) {
			int A = in.nextInt();
			int B = in.nextInt();

			int c = 0;
			int[] list = new int[ndigits(B)];
			numbers: for (int i = A; i <= B; i++) {
				int digs = ndigits(i);
				int rot = i;
				int pairs = 0;

				Arrays.fill(list, -1);
				list[0] = i;

				digits: for (int j = 1; j <= digs + 1; j++) {

					rot = rot(rot, digs);
					if(rot < i)
						continue;

					if (A <= rot && rot <= B) {
						for (int k = 0; k < j; k++) {
							if (list[k] == rot) {
								continue digits;
							}
						}
						pairs++;
						list[j] = rot;
					}
				}

				//c += pairs * (pairs + 1) / 2;
				c += pairs ;
				// c+=digs;
			}
			out.println("Case #" + t + ": " + c);
		}

		in.close();
		out.close();
	}
}

import java.util.*;

public class C {

  public static void main(String[] args) {
    new C();
  }
  
  private Set<Integer> NUMSET;
  
  public C() {
    Scanner scan = new Scanner(System.in);
    
    int NCASES = scan.nextInt();
    for (int ZZ = 1; ZZ <= NCASES; ZZ++) {
      int A = scan.nextInt();
      int B = scan.nextInt();
      NUMSET = new TreeSet<Integer>();
      int nDigits = String.valueOf(A).length();
      long count = 0;
      for (int i = A; i <= B; i++) {
        count += rot(i, A, B, nDigits);
      }
      System.out.println("Case #"+ZZ+": "+count);
    }
  }
  
  private int rot(int num, int min, int max, int len) {
    NUMSET.clear();
    for (int i = 1; i < len; i++) {
      int divisor = (int) (Math.pow(10, i));
      int mult = (int) (Math.pow(10, len-i));
      int one = num / divisor;
      int two = (num % divisor)*mult;
      int next = two+one;
      if (next > num && next <= max) {
        NUMSET.add(next);
      }
    }
    return NUMSET.size();
  }

}