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.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.StringTokenizer;
import java.util.concurrent.Callable;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

public class CMain {
  
  private static final ExecutorService pool = Executors.newFixedThreadPool(Runtime.getRuntime().availableProcessors());
  
  /**
   * @param args
   * @throws IOException
   * @throws ExecutionException 
   * @throws InterruptedException 
   */
  public static void main(String[] args) throws IOException, InterruptedException, ExecutionException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    int casesCnt = Integer.parseInt(reader.readLine());
    
    List<Future<Integer>> futures = new ArrayList<Future<Integer>>();
    
    for (int i = 0; i < casesCnt; i++) {
      final String line = reader.readLine();
      Callable<Integer> task = new Callable<Integer>() {
        @Override
        public Integer call() throws Exception {
          int result = solve(line);
          return result;
        }
      };
      Future<Integer> future = pool.submit(task);
      futures.add(future);
    }
    
    int caseN = 1;
    for (Future<Integer> future : futures) {
      int result = future.get();
      System.out.printf("Case #%d: %d%n", caseN++, result);
    }
    
    pool.shutdownNow();
  }
  
  private static int solve(String line) {
    final StringTokenizer tokens = new StringTokenizer(line);
    final int A = Integer.parseInt(tokens.nextToken());
    final int B = Integer.parseInt(tokens.nextToken());
    int result = solveInner(A, B);
    return result;
  }
  
  private static int solveInner(int A, int B) {
    class Pair {
      public Pair(int x, int y) {
        if (x < y) {
          this.x = x;
          this.y = y;
        } else {
          this.x = y;
          this.y = x;
        }
      }
      final int x;
      final int y;
      @Override
      public int hashCode() {
        final int prime = 31;
        int result = 1;
        result = prime * result + x;
        result = prime * result + y;
        return result;
      }
      @Override
      public boolean equals(Object obj) {
        if (this == obj)
          return true;
        if (obj == null)
          return false;
        if (getClass() != obj.getClass())
          return false;
        Pair other = (Pair) obj;
        if (x != other.x)
          return false;
        if (y != other.y)
          return false;
        return true;
      }
    }
    Set<Pair> results = new HashSet<Pair>();
    for (int num = A; num <= B; num++) {
      // max chunk size = floor(log(number))
      final int numLen = digits(num);
      for (int chunkLength = 1; chunkLength < numLen; chunkLength++) {
        int recycled = recycle(num, numLen, chunkLength);
        if (recycled != num && recycled >= A && recycled <= B
            && digits(recycled) == numLen) {
          results.add(new Pair(num, recycled));
        }
      }
    }
    return results.size();
  }
  
  /** max 2 millions */
  private static int digits(int num) {
    if (num < 10)
      return 1;
    if (num < 100)
      return 2;
    if (num < 1000)
      return 3;
    if (num < 10000)
      return 4;
    if (num < 100000)
      return 5;
    if (num < 1000000)
      return 6;
    return 7;
  }

  private static int recycle(int num, int numLength, int endChunkLength) {
    int base = (int) Math.pow(10, endChunkLength);
    int result = (num % base) * ((int) Math.pow(10, numLength - endChunkLength)) + num / base;
    return result;
  }

}
