#define  _CRT_SECURE_NO_WARNINGS
#include <stdio.h>
#include <algorithm>
#include <utility>
#include <functional>
#include <cstring>
#include <queue>
#include <stack>
#include <math.h>
#include <iterator>
#include <vector>
#include <string>
#include <set>
#include <math.h>
#include <iostream> 
#include<map>
#include <iomanip>
#include <time.h>
#include <random>
#include <stdlib.h>
#include <list>
#include <typeinfo>
#include <list>
#include <set>
using namespace std;
#define LONG_INF 10000000000000000
#define MAX_MOD 1000000007
#define REP(i,n) for(long long i = 0;i < n;++i)
long long plus_map[2][10000] = {};
long long dper[2][300][2][5000] = {};
int main() {
	string a, b;
	cin >> a >> b;
	for (int i = 0;i < 2;++i) {
		string m;
		if (i == 0) {
			m = a;
		}
		else m = b;
		dper[i][0][1][0] = 1;
		for (int q = 0;q < m.length();++q) {
			for (int j = 0;j < 4000;++j) {
				//どの数でも選べる
				for (int t = 0;t < 10;++t) {
					dper[i][q+1][0][t + j] += dper[i][q][0][j];
					dper[i][q+1][0][t + j] %= MAX_MOD;
				}
				//どの数でも選べない
				for (int t = 0;t < m[q] - '0';++t) {
					dper[i][q+1][0][t + j] += dper[i][q][1][j];
					dper[i][q+1][0][t + j] %= MAX_MOD;
				}
				dper[i][q+1][1][j + (m[q] - '0')] += dper[i][q][1][j];
				dper[i][q+1][1][j + (m[q] - '0')] %= MAX_MOD;
			}
		}
		for (int q = 1;q < 5000;++q) {
			plus_map[i][q] = dper[i][m.length()][0][q] + dper[i][m.length()][1][q];
		}
	}
	long long ans = 0;
	for (int i = 1;i < 5000;++i) {
		ans += plus_map[0][i] * plus_map[1][i];
		ans %= MAX_MOD;
	}
	cout << ans << endl;
	return 0;
}