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.FileReader;


public class C {

	private static final String head = "Case #";

	public static void main(String[] args) {
        try{
            FileReader f = new FileReader(args[0]);
            BufferedReader b = new BufferedReader(f);
            String s;
            boolean ff = false;
            int c = 0;
            while((s = b.readLine())!=null){
            	if (!ff){ff=true;continue;}
            	else {
            		c++;
            		System.out.println(head + c + ": " + C.getI(s));
            	}
            }
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
        	
        }
	}
	
	private static int getI(final String line) {
		int r = 0;
		int a,b;
		String[] sp = line.split(" ");
		a = Integer.valueOf(sp[0]);
		b = Integer.valueOf(sp[1]);
		for (int x = a; x <= b; x++) {
			for (int y = 0; y < String.valueOf(x).length(); y++) {
				if (y != 0) {
					int re = C.getRR(x, y);
					if (re <= 11 || re >= x) {continue;}
					else {
						if (re >= a && re <= b) {
							r++;		
						}
					}
				}
			}
		}
		return r;
	}
	private static Integer getRR(final int v, final int o) {
		StringBuilder sb = new StringBuilder();
		String str = String.valueOf(v);
		sb.append(str.substring(o));
		sb.append(str.substring(0, o));
		return Integer.valueOf(sb.toString());
	}
}
