import java.util.*;
import java.lang.*;
import java.math.*;
import java.io.*;

import static java.lang.Math.*;
import static java.util.Arrays.*;
import static java.util.Collections.*;

public class C{
	Scanner sc=new Scanner(System.in);

	int INF=1<<28;
	double EPS=1e-9;

	int caze, T;
	int A, B;

	void run(){
		T=sc.nextInt();
		for(caze=1; caze<=T; caze++){
			A=sc.nextInt();
			B=sc.nextInt();
			solve();
		}
	}

	void solve(){
		int ans=0;
		for(int n=A; n<=B; n++){
			int digit=(int)(log10(n)+EPS);
			int d=(int)pow(10, digit);
			// debug("n", n);
			for(int m=rot(n, d); m!=n; m=rot(m, d)){
				// debug("m", m);
				if(n<m&&m<=B){
					ans++;
				}
			}
		}
		answer(ans+"");
	}

	int rot(int n, int d){
		return n/10+n%10*d;
	}

	void answer(String s){
		println("Case #"+caze+": "+s);
	}

	void println(String s){
		System.out.println(s);
	}

	void print(String s){
		System.out.print(s);
	}

	void debug(Object... os){
		System.err.println(deepToString(os));
	}

	public static void main(String[] args){
		try{
			System.setIn(new FileInputStream("dat/C-small.in"));
			System.setOut(new PrintStream(new FileOutputStream("dat/C-small.out")));
		}catch(Exception e){}
		new C().run();
		System.out.flush();
		System.out.close();
	}
}

package info.m3o.gcj2012.recyclednumber;

public class TestMainRecycledNumber {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub

		int inA, inB;
		int caseCount = 0;
		// System.out.println("T=" + inT);

		ResultUtil resultUtil = new ResultUtil();

		// inA = Integer.valueOf(s[0]);
		// inB = Integer.valueOf(s[1]);
		inA = 1000000;
		// inB = 2000000;
		inB = 2000000;
		// System.out.println("A=" + inA + "B=" + inB );
		caseCount++;

		/*
		 * Start the actual Job
		 */
		resultUtil.clearSets();
		int n, numRecycledNumber;
		RecycledNumber recycledNumber;
		for (n = inA; n <= inB; n++) {
			recycledNumber = new RecycledNumber(n, inA, inB);
			recycledNumber.addRecycledNumbers(resultUtil.recycledNumberSet,
					resultUtil.testedNumberSet);
			for (String s : RecycledNumber.getCycledNumber(recycledNumber
					.getNumStr())) {
				recycledNumber.addRecycledNumbers(resultUtil.recycledNumberSet,
						resultUtil.testedNumberSet, s);
				
			}

			// recycledNumber.addRecycledNumbers(resultUtil.recycledNumberSet,
			// resultUtil.testedNumberSet);
		}
		numRecycledNumber = resultUtil.recycledNumberSet.size();

		System.out.print("Case #" + caseCount + ": ");
		System.out.println(numRecycledNumber);
//		for (MyNumberStringPair mnsp : resultUtil.recycledNumberSet) {
//			System.out.println("(" + mnsp.getS1() + ", " + mnsp.getS2() + ") ");
//		}
//		 System.out.println("END");

		// System.out.println("TestRecycleat = " +
		// RecycledNumber.testrecycleAt());

		// System.out.println("caseCount="+caseCount);
		// assert (inT == caseCount) : "CaseCount mismatch";

	}

}
