import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;

public class Recycled {
    public static void main(String[] args) {
        try {
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
            int t = Integer.parseInt(br.readLine());
            for (int i = 0; i < t; i++) {
                String[] str = br.readLine().split(" ");
                int a = Integer.parseInt(str[0]);
                int b = Integer.parseInt(str[1]);
                System.out.println("Case #" + (i + 1) + ": " + find(a, b));
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private static int find(int a, int b) {
        HashSet<Long> used = new HashSet<Long>();
        int digits = String.valueOf(a).length();
        if (digits == 1) return 0;
        for (int i = a; i <= b; i++) {
            int s = 10;
            int m = (int) Math.pow(10, digits-1);
            for (int j = 0; j < digits-1; j++) {
                int r = i % s;
                if (r < s/10) continue;
                int q = i / s;
                int rn = r * m + q;
                s *= 10; m /= 10;
                if (i != rn && rn >= a && rn <= b) {
                    long pp;
                    if (rn < i) pp = (long)rn << 30 | i;
                    else pp = (long)i << 30 | rn;
                    if (!used.contains(pp)) {
                        used.add(pp);
                    }
                }
            }
        }
        return used.size();
    }
}

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.util.StringTokenizer;


public class JamInputReader {
	int		numItem;
	String	thisLine = null;
	BufferedReader	in;
	StringTokenizer	tokenizer;
	
	public JamInputReader(String fileName) {
		try {
			in = new BufferedReader(new FileReader(fileName));
/*			String text = in.readLine();
			numItem = Integer.parseInt(text);*/
			
			readNextLine();
			tokenizer = new StringTokenizer(thisLine, " ");
			
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} 
	}
	
	void readNextLine() {
		try {
			thisLine = in.readLine();
		} catch (IOException e) {
			e.printStackTrace();
		}
	}
	
	int getNumItems() {
		numItem = Integer.parseInt(tokenizer.nextToken());
		return numItem;
	}
	
	String getNextItem() {
		if(false == tokenizer.hasMoreTokens()) {
			readNextLine();
			tokenizer = new StringTokenizer(thisLine, " ");
		}
		return tokenizer.nextToken();
	}

	String getNextLine() {
		readNextLine();
		return thisLine;
	}
	
	int getNextInt() {
		return Integer.parseInt(getNextItem());
	}
	
	long getNextLong() {
		return Long.parseLong(getNextItem());
	}
	
	byte[] getNextLineByte() {
		readNextLine();
		return thisLine.getBytes(); 
	}
}
