package jp.funnything.competition.util;

import java.math.BigInteger;

/**
 * Utility for BigInteger
 */
public class BI {
    public static BigInteger ZERO = BigInteger.ZERO;
    public static BigInteger ONE = BigInteger.ONE;

    public static BigInteger add( final BigInteger x , final BigInteger y ) {
        return x.add( y );
    }

    public static BigInteger add( final BigInteger x , final long y ) {
        return add( x , v( y ) );
    }

    public static BigInteger add( final long x , final BigInteger y ) {
        return add( v( x ) , y );
    }

    public static int cmp( final BigInteger x , final BigInteger y ) {
        return x.compareTo( y );
    }

    public static int cmp( final BigInteger x , final long y ) {
        return cmp( x , v( y ) );
    }

    public static int cmp( final long x , final BigInteger y ) {
        return cmp( v( x ) , y );
    }

    public static BigInteger div( final BigInteger x , final BigInteger y ) {
        return x.divide( y );
    }

    public static BigInteger div( final BigInteger x , final long y ) {
        return div( x , v( y ) );
    }

    public static BigInteger div( final long x , final BigInteger y ) {
        return div( v( x ) , y );
    }

    public static BigInteger mod( final BigInteger x , final BigInteger y ) {
        return x.mod( y );
    }

    public static BigInteger mod( final BigInteger x , final long y ) {
        return mod( x , v( y ) );
    }

    public static BigInteger mod( final long x , final BigInteger y ) {
        return mod( v( x ) , y );
    }

    public static BigInteger mul( final BigInteger x , final BigInteger y ) {
        return x.multiply( y );
    }

    public static BigInteger mul( final BigInteger x , final long y ) {
        return mul( x , v( y ) );
    }

    public static BigInteger mul( final long x , final BigInteger y ) {
        return mul( v( x ) , y );
    }

    public static BigInteger sub( final BigInteger x , final BigInteger y ) {
        return x.subtract( y );
    }

    public static BigInteger sub( final BigInteger x , final long y ) {
        return sub( x , v( y ) );
    }

    public static BigInteger sub( final long x , final BigInteger y ) {
        return sub( v( x ) , y );
    }

    public static BigInteger v( final long value ) {
        return BigInteger.valueOf( value );
    }
}

import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Scanner;

public class codejam_C_small {
	public static void main(String[] args) throws IOException {
		FileUtil.Timer.start();

		Scanner scanner = new Scanner(System.in);
		int numOfTest = scanner.nextInt();
		scanner.nextLine();
		String[] testCases = new String[numOfTest];
		for (int i = 0; i < numOfTest; i++) {
			testCases[i] = scanner.nextLine();
		}

		String[] finalResult = new String[numOfTest];
		for (int i = 0; i < numOfTest; i++) {
			String testCase = testCases[i];
			String result = runTestCase(testCase);
			finalResult[i] = FileUtil.formatTestResult(i, result);
			System.out.println(finalResult[i]);
		}
		FileUtil.Timer.stop();
	}

	private static String runTestCase(String testCase) {
		String[] splits = testCase.split(" ");
		long lowerBound = FileUtil.toNumber(splits[0]);
		long upperBound = FileUtil.toNumber(splits[1]);
		if (lowerBound > upperBound || upperBound < 10) {
			return "0";
		}

		int count = 0;
		// System.out.println("Lower: " + lowerBound + ", Upper: " +upperBound
		// );
		Map<Long, Long> cachedMap = new HashMap<Long, Long>();
		for (long start = lowerBound; start < upperBound; start++) {
			long intermidate = start;
			int numOfShift = String.valueOf(start).length() - 1;
			if (numOfShift < 0) {
				continue;
			}

			for (int i = 0; i < numOfShift; i++) {
				intermidate = shiftLongNumber(intermidate, numOfShift);
				if (intermidate > start && intermidate <= upperBound) {
					if ((cachedMap.containsKey(intermidate) && cachedMap.get(
							intermidate).equals(start))
							|| (cachedMap.containsKey(start) && cachedMap.get(
									intermidate).equals(intermidate))) {
						// System.out.println(start + ", " + intermidate);
					} else {
						cachedMap.put(intermidate, start);
						count++;
					}
				}
			}
		}
		return String.valueOf(count);
	}

	private static long shiftLongNumber(long input, int numOfShift) {
		long lastDigit = input % 10;
		long reminder = input / 10;
		return (long) (Math.pow(10, numOfShift) * lastDigit + reminder);
	}
}
