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.util.Scanner;


public class Recycled {
	/*
	private static boolean areTwoMirrors(int n, int m, int A, int B) {
		if (A > n || n >= m || m > B) return false;
		
		String mStr = Integer.toString(m);
		String nStr = Integer.toString(n);
		if (mStr.charAt(0) == '0' || nStr.charAt(0)=='0') return false;
		if (mStr.length() != nStr.length()) return false;
		for (int i=1; i < nStr.length(); i++) {
			nStr = nStr.substring(1) + nStr.charAt(0);
			if (nStr.equals(mStr)) return true;
		}
		return false;
	}*/
	static int[] powersOfTen = new int[7];
	private static int process(int A, int B) {
		//boolean[] hasVisited = new boolean[B+1];
		int numDigits = Integer.toString(A).length();
		int count = 0;
		for (int i = A; i < B; i++) {
			int num = i;
			for (int start = 1; start < numDigits; start++) {
				int firstDigit = num/powersOfTen[numDigits-1];
				num -= firstDigit*powersOfTen[numDigits-1];
				num *= 10;
				num += firstDigit;
				if (num <= B && num > i) {
					//if (!areTwoMirrors(i,num,A,B)) System.out.println("Jlfwje");
					//System.out.println(i+" "+num);
					count++;
				}
			}
		}
		return count;
	}
	public static void main(String[] args) {
		int currPower = 1;
		for (int i=0; i < powersOfTen.length; i++) {
			powersOfTen[i] = currPower;
			currPower *= 10;
		}
		Scanner in = new Scanner(System.in);
		int T = in.nextInt();
		for (int i=0; i < T; i++) {
			int A = in.nextInt();
			int B = in.nextInt();
			System.out.println("Case #"+(i+1)+": "+process(A,B));
		}
		
		//System.out.println(process(A,B));
	}
}
