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 long int INF = 1e18;
inline long long int in() {
  long long int p = 0;
  register char ch = 0;
  while (ch < '0' or ch > '9') {
    ch = getchar();
  }
  while (ch >= '0' and ch <= '9') {
    p = (p << 1) + (p << 3) + ch - '0';
    ch = getchar();
  }
  return p;
}
long long int n, k;
long long int dp[2005][2005];
long long int rec(long long int st, long long int rem) {
  if (rem == 0) return 1;
  if (dp[st][rem] != -1) return dp[st][rem];
  long long int a = 1, b = st, res = 0;
  for (long long int i = b; b <= n;) {
    res += ((rec(b, rem - 1)) % 1000000007);
    a++;
    b = st * (a);
  }
  return dp[st][rem] = (res) % 1000000007;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  cin >> n >> k;
  memset(dp, -1, sizeof(dp));
  cout << rec(1, k) << endl;
  return 0;
}