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>
const int MOD = 1e9 + 7;
const int ms = 2020;
int dp[ms][ms];
int main() {
  int n, k;
  std::cin >> k >> n;
  for (int i = 1; i <= k; i++) {
    dp[1][i] = 1;
  }
  for (int i = 2; i <= n; i++) {
    for (int j = 1; j <= k; j++) {
      for (int kk = j; kk <= k; kk += j) {
        dp[i][kk] =
            (dp[i][kk] + dp[i - 1][j] >= MOD ? dp[i][kk] + dp[i - 1][j] - MOD
                                             : dp[i][kk] + dp[i - 1][j]);
      }
    }
  }
  int ans = 0;
  for (int i = 1; i <= k; i++) {
    ans = (ans + dp[n][i] >= MOD ? ans + dp[n][i] - MOD : ans + dp[n][i]);
  }
  std::cout << ans << std::endl;
}