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.*;
import java.math.*;

public class Main {

    public void solve() throws IOException {
        int tests = nextInt();
        HashSet<Long> hs = new HashSet<Long>();
        for (int test=1; test<=tests; test++) {
            out.print("Case #"+test+": ");
            int a = nextInt();
            int b = nextInt();
            int t = Integer.valueOf(a).toString().length();
            int dp = 1;
            for (int i=1; i<t; i++) dp *= 10;
            int res = 0;
            for (int i=a; i<=b; i++) {
                int x = i;
                for (int j=1; j<t; j++) {
                    int d = x%10;
                    x /= 10;
                    x = x+d*dp;
                    if (x>i && x>=a && x<=b) {
                        hs.add(x*100l*dp+i);
                        res++;
                    }
                   // out.println(i+" "+x);
                }
            }
            res = hs.size();
            out.println(hs.size());
            hs.clear();
        }
    }






    BufferedReader br;
    StringTokenizer st;
    PrintWriter out;

    public void run() {
        try {
            //br = new BufferedReader(new InputStreamReader(System.in));
            //out = new PrintWriter(System.out);
            br = new BufferedReader(new FileReader("input.txt"));
            out = new PrintWriter("output.txt");
            solve();
            br.close();
            out.close();
        } catch (IOException e) {
            e.printStackTrace();
            System.exit(123);
        }
    }

    String next() throws IOException {
        while (st == null || !st.hasMoreTokens()) {
            String s = br.readLine();
            if (s == null)
                return null;
            st = new StringTokenizer(s);
        }
        return st.nextToken();
    }

    double nextDouble() throws IOException {
        return Double.parseDouble(next());
    }

    int nextInt() throws IOException {
        return Integer.parseInt(next());
    }

    long nextLong() throws IOException {
        return Long.parseLong(next());
    }

    public static void main(String[] args) {
        new Main().run();
    }
}
