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;
int dx[4] = {0, 0, -1, 1};
int dy[4] = {1, -1, 0, 0};
int dp[4500][4500] = {};
int main() {
  int n, l;
  cin >> n >> l;
  for (int i = 1; i < n + 1; i += 1) dp[i][1] = 1;
  for (int i = 1; i < n + 1; i += 1)
    for (int j = 1; j < l + 1; j += 1)
      for (int k = i; k < n + 1; k += i)
        dp[k][j + 1] = (dp[k][j + 1] + dp[i][j]) % 1000000007;
  int ans = 0;
  for (int i = 1; i < n + 1; i += 1) ans = (ans + dp[i][l]) % 1000000007;
  cout << ans << '\n';
}