using System;
using System.Collections.Generic;
using System.Collections;
using System.Collections.Specialized;
using System.Linq;
using System.Text;
using System.IO;
using System.Reflection;
using static System.Math;
using System.Numerics;
static class Program{
	const int mod=(int)1e9+7;
	const double eps=1e-11;
	static void Main(){
		Sc sc=new Sc();
		var s=sc.La;
		var t=(s[0]-1).ToString();
		Console.WriteLine("{0}",Fu(s[1])-Fu(s[0]-1)-((t[0]=='2'&&t[t.Length-1]=='1')||s[0]==2?1:0));
	}
	static long Fu(long q){
		var t=q.ToString();
		int n=t.Length;
		var dp=new long[n+1,2,2,2,2,7];
		dp[0,0,0,0,0,0]=1;
		for(int i=0;i<n;i++){
			for(int j=0;j<2;j++){
				for(int k=0;k<2;k++){
					for(int l=0;l<2;l++){
						for(int m=0;m<2;m++){
							for(int o=0;o<7;o++){
								if((int)dp[i,j,k,l,m,o]==0){continue;}
								int lm=j==0?t[i]-'0':9;
								for(int d=0;d<=lm;d++){dp[i+1,(j==1||d<lm)?1:0,d!=0?1:k,d==1?1:0,(k==0&&d==2)?1:m,o+((l==1&&d==2)?1:0)]+=dp[i,j,k,l,m,o];}
							}
						}
					}
				}
			}
		}
		long ans=dp[n,1,1,1,1,0];
		if(q>=2){ans++;}
		for(int i = 1;i<7;i++) {
			var p=dp[n,1,1,0,0,i]+dp[n,0,1,0,0,i];
			p+=dp[n,1,1,1,0,i]+dp[n,0,1,1,0,i];
			p+=dp[n,1,1,0,1,i]+dp[n,0,1,0,1,i];
			p+=dp[n,1,1,1,1,i]+dp[n,0,1,1,1,i];
			ans+=p*i+dp[n,1,1,1,1,i];
		}
		return ans;
	}
}
public class Sc{
	public int I{get{return int.Parse(Console.ReadLine());}}
	public long L{get{return long.Parse(Console.ReadLine());}}
	public double D{get{return double.Parse(Console.ReadLine());}}
	public string S{get{return Console.ReadLine();}}
	public int[] Ia{get{return Array.ConvertAll(Console.ReadLine().Split(),int.Parse);}}
	public long[] La{get{return Array.ConvertAll(Console.ReadLine().Split(),long.Parse);}}
	public double[] Da{get{return Array.ConvertAll(Console.ReadLine().Split(),double.Parse);}}
	public string[] Sa{get{return Console.ReadLine().Split();}}
	public object[] Oa{get{return Console.ReadLine().Split();}}
	public int[] Ia2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),int.Parse);}}
	public int[] Ia3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),int.Parse);}
	public int[] Ia3(int a){return Array.ConvertAll((Console.ReadLine()+" "+a.ToString()).Split(),int.Parse);}
	public long[] La2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),long.Parse);}}
	public long[] La3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),long.Parse);}
	public long[] La3(int a){return Array.ConvertAll((Console.ReadLine()+" "+a.ToString()).Split(),long.Parse);}
	public double[] Da2{get{return Array.ConvertAll(("0 "+Console.ReadLine()+" 0").Split(),double.Parse);}}
	public double[] Da3(string a,string b){return Array.ConvertAll((a+Console.ReadLine()+b).Split(),double.Parse);}
	public T[] Arr<T>(int n,Func<T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f();}return a;}
	public T[] Arr<T>(int n,Func<int,T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i);}return a;}
	public T[] Arr<T>(int n,Func<string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(Console.ReadLine().Split());}return a;}
	public T[] Arr<T>(int n,Func<int,string[],T> f){var a=new T[n];for(int i=0;i<n;i++){a[i]=f(i,Console.ReadLine().Split());}return a;}
}