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 dp[2001][2000] = {0}, x;
int n;
int f(int k, int m) {
  if (dp[k][m]) {
    return dp[k][m];
  }
  if (m == x - 1) {
    dp[k][m] = 1;
    return dp[k][m];
  }
  int res = 0;
  int i;
  for (i = k; i <= n; i += k) {
    res += f(i, m + 1) % 1000000007;
    res %= 1000000007;
  }
  dp[k][m] = res;
  return dp[k][m];
}
int main() {
  int res = 0;
  int i;
  cin >> n >> x;
  for (i = 1; i <= n; i++) {
    res += f(i, 0) % 1000000007;
    res %= 1000000007;
  }
  cout << res;
}