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();
    }
}

import java.io.IOException;
import java.math.BigDecimal;
import java.util.Arrays;
import java.util.List;

public class MinimumScalar extends JamProblem {
    public static void main(String[] args) throws IOException {
        MinimumScalar p = new MinimumScalar();
        p.go();
    }
    @Override
    String solveCase(JamCase jamCase) {
        MSCase c= (MSCase) jamCase;
        Arrays.sort(c.a);
        Arrays.sort(c.b);

        BigDecimal b = new BigDecimal(0);
        for (int i=0; i< c.lengh; i++) {
            BigDecimal aaa = new BigDecimal(c.a[i]);
            BigDecimal bbb = new BigDecimal(c.b[c.lengh - i - 1]);
            b = b.add(aaa.multiply(bbb));
        }
        return "" + b;
    }

    @Override
    JamCase parseCase(List<String> file, int line) {
        MSCase c= new MSCase();
        c.lineCount=3;
        int i = line;
        c.lengh = Integer.parseInt(file.get(i++));
        c.a = JamUtil.parseIntList(file.get(i++),c.lengh);
        c.b = JamUtil.parseIntList(file.get(i++),c.lengh);
        return c;
    }
}

class MSCase extends JamCase {
    int lengh;
    int[] a;
    int[] b;
}

