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.*;
public class Recycled {
	static boolean[] vis;
	static int pairs;
	static int countDig(int a) {
		int res = 1;
		while(a >= 10) {
			a /= 10;
			res++;
		}
		return res;
	}
	static void solve() throws IOException {
		int T = nextInt();
		for(int c = 1; c <= T; c++) {
			int A = nextInt();
			int B = nextInt();
			vis = new boolean[B+1];
			int res = 0;
			for(int i = A; i <= B; i++) {
				int pairs = 1;
				if(!vis[i]) {
					vis[i] = true;
					int dig = countDig(i);
					for(int j = 1; j < dig; j++) {
						int suf = i % (int)Math.pow(10, j);
						int temp = i;
						temp /= Math.pow(10, j);
						if(countDig(suf) != j || suf == 0)
							continue;
						temp += suf * Math.pow(10, dig - j);
						if(temp <= B && temp >= A) {
							if(vis[temp])
								continue;
							vis[temp] = true;
							pairs++;
						}
					}
				}
				res += pairs * (pairs - 1) / 2;
			}
			out.println("Case #" + c + ": " + res);
		}
	}
	public static void main(String[] args) {
		try {
			br = new BufferedReader(new FileReader("input.txt"));
			out = new PrintWriter(new BufferedWriter(new FileWriter("output.txt")));
			solve();
			out.close();
		} catch (Throwable e) {
			e.printStackTrace();
			System.exit(239);
		}
	}
	static BufferedReader br;
	static StringTokenizer st;
	static PrintWriter out;
	static String nextToken() throws IOException {
		while (st == null || !st.hasMoreTokens()) {
			String line = br.readLine();
			if (line == null) {
				return null;
			}
			st = new StringTokenizer(line);
		}
		return st.nextToken();
	}
	static int nextInt() throws IOException {
		return Integer.parseInt(nextToken());
	}	
	static long nextLong() throws IOException {
		return Long.parseLong(nextToken());
	}
	static double nextDouble() throws IOException {
		return Double.parseDouble(nextToken());
	}
}
