import java.util.HashMap;
import java.util.HashSet;
import java.util.Scanner;

public class Recycle {

	private static HashMap<Integer, HashSet<Integer>> map = new HashMap<Integer, HashSet<Integer>>();
	private static HashSet<Integer> toSkip = new HashSet<Integer>();
	/**
	 * @param args
	 */
	public static void main(String[] args) {
		Scanner reader = new Scanner(System.in);
		int T = reader.nextInt();
		for (int tc = 1; tc <= T; tc++) {
			int a = reader.nextInt();
			int b = reader.nextInt();
			long before = System.currentTimeMillis();
			int res = doit(a, b);
			System.out.printf("Case #%d: %d\n", tc, res);
			long after = System.currentTimeMillis();
//			System.out.println("time taken: " + (after - before));
		}
	}

	private static int doit(int a, int b) {
		int count = 0;
		HashSet<Integer> skip = new HashSet<Integer>(toSkip);
		for (int i = a; i <= b; i++) {
			if (skip.contains(i))
				continue;
			HashSet<Integer> arr = generate(i);
//			if(arr.size() > 1) {
//				map.put(i, arr);
//			}
			// System.out.println(i + " --> " +
			// Arrays.deepToString(arr.toArray()));
			int temp = 0;
			if (arr.size() > 1) {
				for (int x : arr) {
					if (x >= a && x <= b) {
						temp++;
						skip.add(x);
					}
				}
				count += temp * (temp - 1) / 2;
			}
//			System.out.println("not skipping " + i + " gen: " + arr.size()+ " " + (temp * (temp - 1) / 2));
		}
		return count;
	}

	private static HashSet<Integer> generate(int num) {
		if(map.containsKey(num)) {
			HashSet<Integer> list = map.get(num);
			return list;
		}
		HashSet<Integer> list = new HashSet<Integer>();
		String s = "" + num;
		list.add(num);
		int len = s.length();
		for (int i = 1; i < len; i++) {
			String temp = s.substring(i) + s.substring(0, i);
			// System.out.println("temp: " + temp);
			if (temp.charAt(0) == '0')
				continue;
			int x = Integer.parseInt(temp);
			if( x <= 2000000) {
				list.add(x);
			}
		}
		if(list.size() > 1) {
			map.put(num, list);
		} else {
			toSkip.add(num);
		}
		return list;
	}

}

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashSet;
import java.util.Set;
import java.util.StringTokenizer;

public class CMain {

  /**
   * @param args
   * @throws IOException
   * @throws NumberFormatException
   */
  public static void main(String[] args) throws IOException {
    BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
    int casesCnt = Integer.parseInt(reader.readLine());

    for (int i = 0; i < casesCnt; i++) {
      String line = reader.readLine();
      solve(i + 1, line);
    }
  }

  private static void solve(int caseN, 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);
    System.out.printf("Case #%d: %d%n", caseN, 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();
  }
  
  private static int digits(int num) {
    return 1 + (int) Math.log10(num);
  }

  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;
  }

}
