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 JAVA):

Solution:

import java.math.BigInteger;
import java.util.Scanner;
public class MashmokhAndACM {

	public static void main(String[] args) {
		Scanner scanner = new Scanner(System.in);
		int n = scanner.nextInt();
		int k = scanner.nextInt();
		scanner.close();
		int[][] posDepth = new int[n][k];
		
		for(int i = 0; i < n; i++) {
			posDepth[i][0] = 1;
		}
		for(int i = n; i > 0; i--) {
			for(int j = 1; j < k; j++) {
				int o = n / i;
				int permutations = posDepth[i-1][j-1];
				for(int l = 2; l <= o; l++) {
					int v = i*l;
					permutations = (permutations+posDepth[v-1][j-1])%1000000007;
				}
				posDepth[i-1][j] = permutations;
			}
		}
		int output = 0;
		for(int i = 0; i < n; i++) {
			output = (output+posDepth[i][k-1])%1000000007;
		}
		System.out.println(output);
	}

}