#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

using namespace std;

/**
 * Auto-generated code below aims at helping you parse
 * the standard input according to the problem statement.
 **/
 bool isSix(long long Number)
 {
     cin >> Number;
     while(Number > 0){
     if(Number%10==6){
         return true;
         }
     else Number=Number/10;
     }
     return false;
 };

 bool isEight(long long Number)
 {
     cin >> Number;
     while(Number > 0){
     if(Number%10==8){
         return true;
         }
     else Number=Number/10;
     }
 };

 bool isLucky()
 {
    if(isEight==true || isSix==true){
        if(isEight==true && isSix==true) return false;
        else return true;
    }
    else return false;
 };

int main()
{
    long long L;
    long long R;
    cin >> L >> R; cin.ignore();
    int count = 0;
    for(long long i=L; i++; i<=R){
    if(isLucky==true){
        count++;
        }
    }



    // Write an action using cout. DON'T FORGET THE "<< endl"
    // To debug: cerr << "Debug messages..." << endl;

    cout << "answer " << count << endl;
}