import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;


public class Main {

//	static int MAX = 10000;
	static int MAX = 2000000;
	static Object[] All = new Object[MAX+1];
	
	static int size( int x ) {
		if(x>999999) return 7;
		if(x>99999)  return 6;
		if(x>9999)   return 5;
		if(x>999)    return 4;
		if(x>99)     return 3;
		if(x>9)      return 2;
		return 1;
	}
	static int[] rotate( int value ) {
		List<Integer> result = new ArrayList<Integer>();
		int[] V = new int[8];
		int s = size(value);
		int x = value;
		
		for(int i=s-1;i>=0;i--) {
			V[i] = x%10;
			x /=10;
		}
		int rot;
		for(int i=1; i<s; i++) {
			if(V[i]!=0){
				rot=0;
				for(int j=0,ii=i;j<s; j++,ii=(ii+1)%s){
					rot=rot*10+V[ii];
				}
				if(rot>value && !result.contains(rot))
					result.add(rot);
			}
		}
		if( result.isEmpty() )
			return null;
		int[] r = new int[result.size()];
		for(int i=0; i<r.length; i++)
			r[i]=result.get(i);
		return r;
	}
	
	static void precalculate() {
		for(int i=1; i<=MAX; i++){
			All[i] = rotate(i);
		}
	}
	static int solve( Scanner in ) {
		int A, B, sol=0;
		
		A = in.nextInt();
		B = in.nextInt();

		for( int i=A; i<=B; i++) {
//			List<Integer> result = rotate(i);
			if( All[i]!=null ) {
				for(int value: (int[])All[i] ) {
					if( value <= B )
						sol++;
				}
			}
		}

		return sol;
	}
	
	public static void main ( String args[] ) {
		int T; 
		Scanner in = new Scanner(System.in);
		T = in.nextInt();
		int cnt=0;
		int sol;
		precalculate();
		for( cnt=1; cnt<=T; cnt++ ) {
			sol = solve( in );
			System.out.printf("Case #%d: %d\n", cnt, sol);
		}

	}
}

import java.io.*;


class RecycledNumbers
{	
	public static void main(String a[]) throws Exception
	{
		BufferedReader br=new BufferedReader( new InputStreamReader(System.in) );
		int testCases=Integer.parseInt(br.readLine());
		int counter=0;
		
		for(int i=0;i<testCases;i++)
		{
			int count=0;
			String [] s=br.readLine().split(" ");
			int lowerLimit=Integer.parseInt(s[0]);
			int upperLimit=Integer.parseInt(s[1]);
			// all the combinations
			int noOfCombinations=s[0].length();
			for(int number=lowerLimit;number<=upperLimit;number++)
			{
				// System.out.print(number);
				int temp=number;
				int lastDigit=0;
				int [] doubling=new int[noOfCombinations];
				for(int ii=0;ii<noOfCombinations-1;ii++)
				{
					lastDigit=temp%10;
					// System.out.print("lastDigit-"+lastDigit);
					temp=(temp/10)+(int)Math.pow(10,(noOfCombinations-1))*lastDigit;
					// System.out.print("::::"+temp);
					if( (number<temp) && (temp<=upperLimit) )
					{
						doubling[ii]=temp;
						int j=0;
						for(j=0;j<ii;j++)
						{
							if(temp==doubling[j])
								break;
						}
						if(j==ii)		
						{
							count++;
							// System.out.println(number+" : "+temp);
						}
					}
				}
				
			}
			//str is changed now, to set to original add ""str=str.charAt(noOfCombinations)+str.substring(noOfCombinations-1);""
			System.out.println("Case #"+(++counter)+": "+count);
		}
	}
	

}