Problem: Mashmokh's boss, Bimokh, didn't like Mashmokh. So he fired him. Mashmokh decided to go to university and participate in ACM instead of finding a new job. He wants to become a member of Bamokh's team. In order to join he was given some programming tasks and one week to solve them. Mashmokh is not a very experienced programmer. Actually he is not a programmer at all. So he wasn't able to solve them. That's why he asked you to help him with these tasks. One of these tasks is the following.

A sequence of l integers b1, b2, ..., bl (1 ≤ b1 ≤ b2 ≤ ... ≤ bl ≤ n) is called good if each number divides (without a remainder) by the next number in the sequence. More formally <image> for all i (1 ≤ i ≤ l - 1).

Given n and k find the number of good sequences of length k. As the answer can be rather large print it modulo 1000000007 (109 + 7).

Input

The first line of input contains two space-separated integers n, k (1 ≤ n, k ≤ 2000).

Output

Output a single integer — the number of good sequences of length k modulo 1000000007 (109 + 7).

Examples

Input

3 2


Output

5


Input

6 4


Output

39


Input

2 1


Output

2

Note

In the first sample the good sequences are: [1, 1], [2, 2], [3, 3], [1, 2], [1, 3].

Solution (in CPP):

Solution:
#include <bits/stdc++.h>
using namespace std;
const long long A = 100000000000000LL, N = 2001, M = 1000000007;
long long k, i, j, n, m, d[N][N], o;
int main() {
  cin >> n >> m;
  for (i = 1; i <= n; i++) d[0][i] = 1;
  for (i = 0; i < m - 1; i++)
    for (j = 1; j <= n; j++) {
      k = 0;
      while (k += j) {
        if (k > n) break;
        d[i + 1][k] += d[i][j];
        d[i + 1][k] %= M;
      }
    }
  for (i = 1; i <= n; i++) o += d[m - 1][i];
  cout << o % M;
}