#include<bits/stdc++.h>

using namespace std;

#define MAXL 10

long long n,m;

long long a[MAXL],dp[MAXL][MAXL];

template <typename T> inline void read(T &x) {

        long long f = ; x = ;

        char c = getchar();

        for (; !isdigit(c); c = getchar()) { if (c == '-') f = -f; }

        for (; isdigit(c); c = getchar()) x = (x << ) + (x << ) + c - '';

        x *= f;

}

template <typename T> inline void write(T x) {

    if (x < ) { putchar('-'); x = -x; }

    if (x > ) write(x/);

    putchar(x%+'');

}

template <typename T> inline void writeln(T x) {

    write(x);

    puts("");

}

inline void getdp() {

        long long i,j,k;

        dp[][] = ;

        for (i = ; i <= MAXL; i++) {

                for (j = ; j <= ; j++) {

                        if (j == ) continue;

                        for (k = ; k <= ; k++) {

                                if (k == ) continue;

                                if (j ==  && k == ) continue;

                                dp[i][j] += dp[i-][k];

                        }

                }

        }

}

inline long long calc(long long n) {

        long long i,j,ans = ;

        a[] = ;

        while(n) {

                a[++a[]] = n % ;

                n /= ;

        }

        a[a[]+] = ;

        for (i = a[]; i >= ; i--) {

                for (j = ; j < a[i]; j++) {

                        if (j == ) continue;

                        if (a[i+] ==  && j == ) continue;

                        ans += dp[i][j];

                }

                if (a[i] == ) break;

                if (a[i+] ==  && a[i] == ) break;

        }

        return ans;

}

int main() {

        getdp();

        while (true) {

                read(n); read(m);

                if (!n && !m) break;

                writeln(calc(m+)-calc(n));

        }

        return ;

}