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;
long long d[2001][2001];
long long ans;
int main() {
  int n, k;
  cin >> n >> k;
  for (int i = 1; i <= n; ++i) d[1][i] = 1;
  for (int j = 2; j <= k; ++j) {
    d[j][1] += d[j - 1][1];
    d[j][1] %= 1000000007;
    for (int i = 2; i <= n; ++i) {
      d[j][i] += d[j - 1][i];
      d[j][i] += d[j - 1][1];
      d[j][i] %= 1000000007;
      for (int v = 2; v * v <= i; ++v)
        if (i % v == 0) {
          if (v * v == i) {
            d[j][i] += d[j - 1][v];
          } else {
            d[j][i] += d[j - 1][v];
            d[j][i] += d[j - 1][i / v];
          }
          d[j][i] %= 1000000007;
        }
    }
  }
  for (int i = 1; i <= n; ++i) {
    ans += d[k][i];
    ans %= 1000000007;
  }
  cout << ans;
  return 0;
}