#include <iostream>
#include <iomanip>
using namespace std;
int main(){
	int m,n,s=0;
	cin>>m>>n; 
    if(m%17!=0){
	m=(m/17+1)*17;} 
	
	for(;m<=n;m+=17)	
	{
	s=s+m;		
	}
    cout<<s;
    return 0;
}