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.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;



public class Solve3 {

	public static void main(String[] args) {

		FileReader fr;
		FileWriter fw;
		try {
			File fi = new File("input.txt");
			fr = new FileReader(fi);
			BufferedReader br = new BufferedReader(fr);
			fw = new FileWriter("output.txt");
			BufferedWriter bw = new BufferedWriter(fw);
			boolean f = true;
			int tCount = Integer.MAX_VALUE;
			int c = 1;
			String line = null;
			while((line = br.readLine()) != null && c <= tCount) {
				if(f) {
					f = false;
					tCount = Integer.parseInt(line);
					continue;
				}

				long ans = getVal(line);
				String os = "Case #" + c + ": " + ans;


				bw.write(os);
				bw.newLine();
				c++;
			}
			bw.flush();
			bw.close();
			br.close();
		} catch (FileNotFoundException eg) {
			// TODO Auto-generated catch block
			eg.printStackTrace();
		} catch (IOException ed) {
			// TODO Auto-generated catch block
			ed.printStackTrace();
		}
	}

	private static int getDC(long n) {
		int c = 0;
		while(n > 0) {
			c++;
			n = n/10;
			if(n == 0) {
				break;
			}
		}
		return c;
	}

	public static long getVal(String line) {
		String[] sa = line.split(" ");
		long n = Integer.parseInt(sa[0].trim());
		long m = Integer.parseInt(sa[1].trim());
		int dc = getDC(n);
		long count = 0;
		Map s = new HashMap();
		for(long i = n; i <= m; i++) {
			Set _s = correct(i, n, m, dc);
			if (_s.isEmpty()) continue;
			Iterator it = _s.iterator();
			while(it.hasNext()) {
			   Long o = (Long)it.next();
			   if (s.containsKey(o)) {
				   it.remove();
			   }
			}
			
			if (_s.isEmpty()) continue;
			s.put(i, _s);
		}
		
		Iterator mit = s.keySet().iterator();
		while(mit.hasNext()) {
			count += ((Set)s.get(mit.next())).size();
		}
		return count;
	}
	
	public static Set correct(long nt, long n, long m, int dc) {
		Set l = new HashSet();
		for(int i = 1; i < dc ;i ++) {
			long tens = (long)Math.pow(10, dc - i);
			long tenso = (long)Math.pow(10, i);
			long left = nt/tens;
			long right = nt%tens;
			long n_ = right * tenso + left;
			if (n_ >= n && n_ <= m && n_ != nt){
				l.add(n_);
			}
		}
		return l;
	}

}


