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);
		}

	}
}

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

/*
 * Recycling (Numbers)
 * Jason Bradley Nel
 * 16287398
 */
import java.util.*;

public class Recycling {
    
    public static void main(String[] args) {
        
        In input = new In("input.txt");

        int T = input.readInt();

        for (int t = 0; t < T; t++){
            int min = input.readInt();
            int max = input.readInt();
            int N = max - min + 1;
            Set<String> set = new HashSet<String>();
            //if (set.isEmpty()) System.out.print("\nSET IS EMPTY");
            for (int i = min; i <= max; i++) {
                String s = "" + i;
                for (int r = 1; r < s.length(); r++) {
                    String m = returnM(s, r);
                    int num = Integer.parseInt(m);
                    String mn = s + m;
                    //System.out.printf("%d(%s)(*%d*), ", i, m, num);
                    if((num >= min) && (num <= max) && (num != i)) set.add(mn);
                }
            }
            
            //if (set.isEmpty()) System.out.print("\nSET IS EMPTY");
            int c = set.size()/2;
            System.out.printf("Case #%d: %d\n", t+1, c);
        }
    }
    
    public static String returnM(String s, int r){
        int N = s.length();
        if(r != N){
        String i = s.substring(0, N - r);
        i = s.substring(N - r, N) + i;
        return i;
        }
        else return s;
    }
}
