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#include <iostream>
#include <vector>
#include <cstring>
using namespace std;

int main()
{ std::ios_base::sync_with_stdio(0);
    unsigned long long w=0;
    unsigned long long n,m;
    cin>>n>>m;
    for(unsigned long long i=n;i<=m;i++)
    {bool git=1; int a=i;
        while(a)
        {if(a%10==0||i%(a%10))git=0;
            
            a/=10;
        }
        if(git){w++;}
        
    }
    cout<<w;
    return 0;
}