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 int module = 1000000007;
int main() {
  int64_t ans;
  long int a[2][2001] = {0}, n, i, j, k, m, x;
  cin >> n >> k;
  for (i = 1; i <= n; i++) a[0][i] = 1;
  long int crow = 0;
  for (i = 1; i < k; i++) {
    crow = 1 - crow;
    for (j = 1; j <= n; j++) a[crow][j] = a[1 - crow][j];
    for (j = 1; j <= n; j++) {
      for (m = j + j; m <= n; m += j)
        a[crow][m] = (a[crow][m] + a[1 - crow][j]) % module;
    }
  }
  ans = 0;
  for (i = 1; i <= n; i++) ans = (ans + a[crow][i]) % module;
  cout << ans;
}