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#include <cstdio>
#include <cstdint>
#include <cinttypes>

bool test(uint64_t number) {
    // size_t size = sizeof(uint64_t);
    uint8_t digit;
    uint8_t i = 0;
    uint64_t temp = number;

    while (temp) {
        digit = temp % 10;
        temp /= 10;
        if (digit == 0) {
            return false;
        }
        if (number % digit != 0) {
            return false;
        }
    }

    return true;
}

int main() {
    uint64_t l, r;
    int num = 0;
    scanf("%" PRIu64  " %" PRIu64 "", &l, &r);

    if (l >= 1 && r >= l && r < 10e18 && l < 10e18) {
        for (l; l <= r; l++) {
            if (test(l)) {
                num++;
            }
        }
        printf("%d\n", num);
        return 0;
    } else {
        return -1;
    }
}