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();
    }
}

package recyclednumbers;

import java.util.ArrayList;

public class RecycledNumbersCase {

    private int min;
    private int max;

    public RecycledNumbersCase(String scoreLine) {

        String[] integers = scoreLine.split(" ");
        if(integers.length > 2 || integers.length < 2) {
            throw new IllegalArgumentException("Exactly two please");
        }

        min = new Integer(integers[0]);
        max = new Integer(integers[1]);
    }

    public int recycledPairCountFromMinToMax() {
        int pairCount = 0;

        for(int i = min; i <= max; i++) {
            pairCount += cycledDigitsInRangeAndGreaterThan(i);
        }
        return pairCount;
    }

    private int cycledDigitsInRangeAndGreaterThan(final int value) {
        int matches = 0;
        final String originalValue = String.valueOf(value);
        String cycledValue = cycleFromBackToFront(originalValue);
        while(!cycledValue.equals(originalValue)) {
            int cycledVal = Integer.valueOf(cycledValue);
            if(cycledVal > value && cycledVal <= max) {
                matches++;
            }
            cycledValue = cycleFromBackToFront(cycledValue);
        }

        return matches;
    }


    public int getMin() {
        return min;
    }

    public int getMax() {
        return max;
    }

    public static String cycleFromBackToFront(String numToCycle) {
        final int numLength = numToCycle.length();
        return numToCycle.substring(numLength - 1) + numToCycle.substring(0, numLength - 1);
    }
}
