/*
 * To change this template, choose Tools | Templates
 * and open the template in the editor.
 */

import java.io.File;
import java.io.FileInputStream;
import java.util.Scanner;

/**
 *
 * @author imgps
 */
public class C {
    public static void main(String args[]) throws Exception{
        int A,B;
        int ctr = 0;
        int testCases;
        
        Scanner sc = new Scanner(new FileInputStream("C-small-attempt0.in "));
        testCases = sc.nextInt();
        int input[][] = new int[testCases][2];
        for(int i=0;i<testCases;i++)
        {
          //  System.out.print("Enter input A B: ");
            input[i][0] = sc.nextInt();
            input[i][1] = sc.nextInt();
            
        }
  

for(int k=0;k<testCases;k++){
      ctr = 0;
      A = input[k][0];
      B = input[k][1];
        for(int i = A;i<=B;i++){
            int num = i;
            int nMul = 1;
            int mul = 1; 
            int tnum = num/10;
            while(tnum > 0){
                mul = mul *10;
                tnum= tnum/10;
            }
            tnum = num;
            int n = 0;
            while(tnum > 0 && mul >= 10){
                nMul = nMul * 10;
                n = (num % nMul) * mul + (num / nMul);
                mul = mul / 10;
                tnum = tnum / 10;
                for(int m=num;m<=B;m++){
                    
                    if(n == m && m > num){
                        ctr++;
                    }
                }
                
                
                
         
            }
        }
        System.out.println("Case #"+(k+1)+": "+ctr);
        
    }
    }
}


public class RecycleNumber {
	
	int count=0;
	public RecycleNumber(int A,int B){
		for(int n=A;n<B-1;n++){
			for(int m=n+1;m<=B;m++){
				if(isRecycledPair(n,m)){
					count++;
				}
			}
		}
	}
	
	public int getCount() {
		return count;
	}


	boolean isRecycledPair(int a,int b){
		String sA=a+"";
		String sB=b+"";
		//start from 
		int countB=sB.length();
		int countA=sA.length();
		if(countA!=countB)return false;
		for(int i=0;i<sA.length();i++){
			if(sA.charAt(i)==sB.charAt(0)){
				if(sA.charAt(i)=='0') continue;
				if(compare(sA,i,sB))
					return true;
			}
		}

		return false;
	}
	private boolean compare(String sA, int i, String sB) {
		// TODO Auto-generated method stub
		int count=0;
		int length=sB.length();
		for(int j=i,k=0;count<length;k++,count++,j=(j+1)%length){
			if(sA.charAt(j)!=sB.charAt(k)){
				return false;
			}
		}
		return true;
	}

}
