import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class Q3M {
	public static void main(String[] args) throws Exception {
		compute();
	}

	private static void compute() throws Exception {
		BufferedReader br = new BufferedReader(new FileReader(new File(
				"C:\\work\\Q3\\C-small-attempt0.in")));
		String line = null;
		int i = Integer.parseInt(br.readLine());
		List l = new ArrayList();
		for (int j = 0; j < i; j++) {
			line = br.readLine();
			String[] nums = line.split(" ");
			l.add(calculate(nums));
		}
		writeOutput(l);
	}

	private static int calculate(String[] nums) {
		int min = Integer.parseInt(nums[0]);
		int max = Integer.parseInt(nums[1]);
		int count = 0;
		List l = new ArrayList();
		for (int i = min; i <= max; i++) {
			for (int times = 1; times < countDigits(i); times++) {
				int res = shiftNum(i, times);
				if (res <= max && i < res) {
					if ((!l.contains((i + ":" + res)))) {
						l.add(i + ":" + res);
						l.add(res + ":" + i);
						count++;
					}
				}
			}
		}
		return count;
	}

	private static boolean checkZeros(int temp, int res) {
		if (temp % 10 == 0 || res % 10 == 0)
			return false;
		return true;
	}

	private static int shiftNum(int n, int times) {
		int base = (int) Math.pow(10, times);
		int temp2 = n / base;
		int placeHolder = (int) Math.pow((double) 10,
				(double) countDigits(temp2));
		int res = placeHolder * (n % base) + temp2;
		if (countDigits(res) == countDigits(n)) {
			return res;
		} else {
			return 2000001;
		}
	}

	public static int countDigits(int x) {
		if (x < 10)
			return 1;
		else {
			return 1 + countDigits(x / 10);
		}
	}

	private static void writeOutput(List l) throws Exception {
		StringBuffer b = new StringBuffer();
		int i = 1;
		BufferedWriter br = new BufferedWriter(new FileWriter(new File(
				"C:\\work\\Q3\\ans.txt")));
		for (Iterator iterator = l.iterator(); iterator.hasNext();) {
			br.write("Case #" + i++ + ": " + iterator.next());
			br.newLine();
		}
		br.close();
	}

}
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.util.HashSet;
import java.util.Iterator;
import java.util.Scanner;

public class RecycledNumbers {

    public static int recycle(int source, int digits) {
        int pow = (int) Math.pow(10, digits - 1);
        int mod = source % 10;
        return pow * mod + source / 10;
    }

    public static class Range {
        public final int A;
        public final int B;

        public Range(int A, int B) {
            this.A = A;
            this.B = B;
        }
    }

    public static Iterator<Range> iterator(Readable input) {
        final Scanner scanner = new Scanner(input);

        return new Iterator<Range>() {
            private int cases = scanner.nextInt();

            @Override
            public boolean hasNext() {
                return cases > 0;
            }

            @Override
            public Range next() {
                int A = scanner.nextInt();
                int B = scanner.nextInt();

                cases--;
                return new Range(A, B);
            }

            @Override
            public void remove() {
                throw new AbstractMethodError();
            }
        };
    }

    public static int recycledPairs(Range scores) {
        int digits = Integer.toString(scores.A).length();
        HashSet<String> pairs = new HashSet<String>();
        for (int i = scores.A; i <= scores.B; i++) {
            int recycled = recycle(i, digits);
            while (recycled != i) {
                if (recycled >= scores.A && recycled <= scores.B) {
                    int first = i < recycled ? i : recycled;
                    int second = i > recycled ? i : recycled;

                    pairs.add(String.format("%d%d", first, second));
                }
                recycled = recycle(recycled, digits);
            }
        }

        return pairs.size();
    }

    public static void main(String[] args) throws FileNotFoundException {
        FileReader fileReader = new FileReader(args[0]);

        int caseId = 1;
        Iterator<Range> iterator = iterator(fileReader);

        while (iterator.hasNext()) {
            int result = recycledPairs(iterator.next());
            System.out.format("Case #%s: %s\n", caseId, result);
            caseId++;
        }
    }
}
