import java.io.*;
import java.util.*;

public class C {

    void solve() throws IOException {
        in("C-large.in"); out("C-large.out");

        long tm = System.currentTimeMillis();
        boolean[] mask = new boolean[2000000];
        int[] r = new int[10];
        int t = readInt();
        for (int cs = 1; cs <= t; ++cs) {
            int a = readInt();
            int b = readInt();
            int ans = 0;
            for (int m = a + 1; m <= b; ++m) {
                char[] d = String.valueOf(m).toCharArray();
                int c = 0;
                for (int i = 1; i < d.length; ++i) {
                    if (d[i] != '0' && d[i] <= d[0]) {
                        int n = 0;
                        for (int j = 0; j < d.length; ++j) {
                            int jj = i + j;
                            if (jj >= d.length) jj -= d.length;
                            n = n * 10 + (d[jj] - '0');
                        }
                        if (n >= a && n < m && !mask[n]) {
                            ++ans;
                            mask[n] = true;
                            r[c++] = n;
                        }
                    }
                }
                for (int i = 0; i < c; ++i) {
                    mask[r[i]] = false;
                }
            }
            println("Case #" + cs + ": " + ans);
            //System.out.println(cs);
        }
        System.out.println("time: " + (System.currentTimeMillis() - tm));
        exit();
    }

    void in(String name) throws IOException {
        if (name.equals("__std")) {
            in = new BufferedReader(new InputStreamReader(System.in));
        } else {
            in = new BufferedReader(new FileReader(name));
        }
    }

    void out(String name) throws IOException {
        if (name.equals("__std")) {
            out = new PrintWriter(System.out);
        } else {
            out = new PrintWriter(name);
        }
    }

    void exit() {
        out.close();
        System.exit(0);
    }

    int readInt() throws IOException {
        return Integer.parseInt(readToken());
    }

    long readLong() throws IOException {
        return Long.parseLong(readToken());
    }

    double readDouble() throws IOException {
        return Double.parseDouble(readToken());
    }

    String readLine() throws IOException {
        st = null;
        return in.readLine();
    }

    String readToken() throws IOException {
        while (st == null || !st.hasMoreTokens()) {
            st = new StringTokenizer(in.readLine());
        }
        return st.nextToken();
    }

    boolean eof() throws IOException {
        return !in.ready();
    }

    void print(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void println(String format, Object ... args) {
        out.println(new Formatter(Locale.US).format(format, args));
    }

    void print(Object value) {
        out.print(value);
    }

    void println(Object value) {
        out.println(value);
    }

    void println() {
        out.println();
    }

    StringTokenizer st;

    BufferedReader in;
    PrintWriter out;

    public static void main(String[] args) throws IOException {
        new C().solve();
    }
}

import java.io.*;
import java.util.Scanner;

public class C {

public static void main(String[] args) throws FileNotFoundException, IOException {
     Scanner sc = new Scanner(new FileReader("input.txt"));
     PrintWriter pw = new PrintWriter(new FileWriter("output.txt"));

        int noOfCases = sc.nextInt();

for (int caseNum = 0; caseNum < noOfCases; caseNum++){
	int A = sc.nextInt();
	int B = sc.nextInt();
	int result =0;
	int numDigits = numdigits(A);
	if(A<10){
     pw.print("Case #" + (caseNum + 1) + ": 0");
	}
	else if(A<100){
		
		for (int i = A; i <= B; i++) {
			if(A<=shift(i, 1) && shift(i, 1)<=B  && i != shift(i, 1)){
				result++;
			}
		}
		pw.print("Case #" + (caseNum + 1) + ": "+ result/2);
	}
	else {
		for (int i = A; i <= B; i++) {
			int	iterator = i;
			for(int j=0; j< numDigits; j++){
						
			if(A<=shift(iterator, numDigits) && shift(iterator, numDigits)<=B  && i <= shift(iterator, numDigits)){			
				if(i == shift(iterator, numDigits) )
				{
					break;
				}
				result++;
				//System.out.println(result+ " " +i+ " " + shift(iterator, numDigits));
			}
			iterator = shift(iterator, numDigits);
		}
		}
		pw.print("Case #" + (caseNum + 1) + ": "+ result);
	}
	
	if(caseNum < noOfCases-1)
     	pw.println("");
}
     

     pw.flush();
     pw.close();
     sc.close();
}

public static int shift(int number, int numdigits){
    int multiplier = (int) Math.pow(10.0, (double)numdigits);
	
	int r = number % 10;
	int result = number/10;
	result = result + multiplier * r;
	return result;	
}

public static int numdigits(int number){
	int numdigits = (int) Math.log10((double)number); // would return numdigits - 1
    
    return numdigits;
}

}
