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.*;
import java.util.HashSet;
import java.util.Set;

public class C {

    private static final String FILE = "C-large";

    private static final boolean SAVE_OUT = true;

    public static void main(String[] args) throws IOException {
        BufferedReader in = createReader();
        FileWriter out;
        if (SAVE_OUT) {
            out = new FileWriter(FILE + ".out");
        }
        int t = Integer.parseInt(in.readLine());
        int c = 0;
        while (t-- > 0) {
            String row = in.readLine();
            String[] split = row.split(" ");
            int a = Integer.parseInt(split[0]);
            int b = Integer.parseInt(split[1]);
            int num = 0;
            for (int i = a; i <= b; ++i) {
                num += calc(i, a, b);
            }
            String res = String.format("Case #%d: %d", ++c, num / 2);
            System.out.println(res);
            if (SAVE_OUT) {
                out.append(res);
                out.append("\n");
            }
        }
        if (SAVE_OUT) {
            out.close();
        }
    }

    private static int calc(int c, int a, int b) {
        int num = 0;
        String s = Integer.toString(c);
        Set<Integer> seen = new HashSet<Integer>();
        for (int i = 1; i < s.length(); ++i) {
            int cc = flip(s, i);
            while (cc <= b) {
                if (seen.contains(cc)) {
                    break;
                }
                if (cc >= a && c != cc) {
                    ++num;
                    seen.add(cc);
                }
                cc *= 10;
            }
        }
        return num;
    }

    private static int flip(String s, int k) {
        String first = s.substring(0, k);
        StringBuilder sb = new StringBuilder();
        sb.append(s.substring(k));
        sb.append(first);
        while (sb.charAt(0) == '0') {
            sb.deleteCharAt(0);
        }
        return Integer.parseInt(sb.toString());
    }

    private static BufferedReader createReader() throws FileNotFoundException {
        return new BufferedReader(new FileReader(FILE + ".in"));
    }
}
