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#include <stdio.h>

bool inline is_valid(long long number)
{
    long long n = number;
    while(n > 0)
    {
        char digit = n % 10;
        if (digit == 0)
            return false;
        if (number % digit != 0)
            return false;
        n /= 10;
    }
    return true;
}

int main()
{
    long long l, r;

    scanf("%lld %lld", &l, &r);

    int count = 0;

    for (long long i = l; i <= r; ++i)
    {
        if(is_valid(i))
            count++;
    }

    printf("%d\n", count);
}