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();
    }
}

/**
 * Copyright 2012 Christopher Schmitz. All Rights Reserved.
 */

package com.isotopeent.codejam.lib.converters;

import com.isotopeent.codejam.lib.InputConverter;

public class DynamicMultiLineConverter implements InputConverter<Object[]> {

	private static final int MAX_PARAM_COUNT = 10;

	private IntArrayLine paramConverter;
	private InputConverter<?> converter;

	private Object[] input;
	private int lineNumber;

	public DynamicMultiLineConverter(InputConverter<?> lineConverter) {
		this(lineConverter, 0);
	}

	public DynamicMultiLineConverter(InputConverter<?> lineConverter, int paramCount) {
		this.converter = lineConverter;
		if (paramCount > 0) {
			paramConverter = new IntArrayLine(paramCount);
		} else {
			paramConverter = new IntArrayLine(new int[MAX_PARAM_COUNT]);
		}
	}

	@Override
	public boolean readLine(String data) {
		if (lineNumber == 0) {
			paramConverter.readLine(data);
			int[] params = paramConverter.generateObject();
			int count = getCount(params);
			input = new Object[count + 1];
			input[lineNumber++] = params;
		} else {
			if (!converter.readLine(data)) {
				input[lineNumber++] = converter.generateObject();
			}
		}

		if (lineNumber >= input.length){
			lineNumber = 0;
		}
		return lineNumber == 0;
	}

	@Override
	public Object[] generateObject() {
		return input;
	}

	/**
	 * default implementation, just uses first parameter value
	 */
	protected int getCount(int[] parameters) {
		return parameters[0];
	}

}
