import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

class RecycledNumbers{
	
	
	
	int getcount(int small,int large){
		int count = 0;
		for(int currnum = small; currnum < large; currnum++){
			int permut = currnum;
			int no_of_digits = 0;
			while(permut > 0){
				permut = permut/10;
				no_of_digits++;
			}
			int lastDigit = currnum % 10;
			permut = currnum / 10;
			permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
			while(permut != currnum){
				
				if(permut >= currnum && permut <= large){
					
					count++;
				}
				lastDigit = permut % 10;
				permut = permut / 10;
				permut = permut + lastDigit * (int)Math.pow(10, no_of_digits-1);
				
			}
			
		}
		
		return count;
	}
	
	public static void main(String args[]){
		RecycledNumbers d = new RecycledNumbers();
		
		int no_of_cases = 0;
		String input = "";
		
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		try{
			no_of_cases = Integer.parseInt(br.readLine());
		}
		catch(Exception e){
			System.out.println("First line is not a number");
		}
		
		for(int i=1; i <= no_of_cases;i++){
			try{
				input = br.readLine();
			}
			catch(Exception e){
				System.out.println("Number of test cases different from the number mentioned in first line");
			}
			
			System.out.print("Case #" +i+": ");
			
			StringTokenizer t =  new StringTokenizer(input);
			int small=0,large=0;
			if(t.hasMoreTokens()){
				small = Integer.parseInt(t.nextToken());
			}
			if(t.hasMoreTokens()){
				large = Integer.parseInt(t.nextToken());
			}
			System.out.println(d.getcount(small,large));
			
		}
		
		
		

	}
	
	
}
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();
  }

}