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();
    }
}

package com.google.codejam;

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class DancingWithGooglers {

	private int limit(long min, long max){
		if (min>max)
			return 0;
		int count = 0;
		for (long i = min; i <= max; i++) {
			int loopCount = 1;
			long start = i;
			long rotation = i;
			do {
				rotation = rotate(start,loopCount);
				if ( rotation <= max && rotation > start) {
//					System.out.println("pair numbers : " + start + "," + rotation);
					count+=1;
				}
//				else{
//					System.out.println("!!not pair numbers : " + start + "," + rotation);
//				}
				loopCount++;

			} while (loopCount<=Long.toString(start).length());
		}
		return count;
	}

//	private long rotate(long x){
//		if (x<9) {
//			return x;
//		}
//		long firstpart = x/10;
//		long secondpart = x%10;
//		double firstpartlen = (String.valueOf(firstpart)).length();
//		int mul = (int) Math.pow(10, firstpartlen);
//		long fin = (secondpart * mul) + firstpart;
//		return fin;
//	}
	private long rotate(long x,int index){
		if (x<9) {
			return x;
		}
		String s = Long.toString(x);
		String s1 = s.substring(0, s.length()-index);
		String s2 = s.substring(s.length()-index, s.length());
		String s3 = s2+s1;
		return Long.parseLong(s3);
	}
	public static void main(String[] args) throws IOException{
		BufferedReader in = new BufferedReader(new FileReader("resources/googlecodejam/dancingwiththegooglers.txt"));
		String strLine;
		int caseLine  = 0;
		int lineCount = 0;
		DancingWithGooglers dancingWithGooglers = new DancingWithGooglers();
		while ((strLine = in.readLine()) != null) {
			// Print the content on the console
			if (lineCount == 0) {
				lineCount+=1;
				continue;
			}
			caseLine += 1;
			long min = Long.parseLong(strLine.split(" ")[0]);
			long max = Long.parseLong(strLine.split(" ")[1]);
			System.out.println("Case #" + caseLine + ": " + dancingWithGooglers.limit(min,max));
		}

	}
}
