#include <bits/stdc++.h>

using namespace std;

int main() {

	string s;
	int n;
	cin >> s >> n;

	for(int i = 0; i < s.length(); i+=n) {
		cout << s[i];
	}

	printf("\n");

	return 0;
}
### Prompt

Your task is to create a Cpp solution to the following problem:

You are given a string S consisting of lowercase English letters. We will write down this string, starting a new line after every w letters. Print the string obtained by concatenating the letters at the beginnings of these lines from top to bottom.

Constraints

* 1 \leq w \leq |S| \leq 1000
* S consists of lowercase English letters.
* w is an integer.

Input

Input is given from Standard Input in the following format:


S
w


Output

Print the desired string in one line.

Examples

Input

abcdefgh
3


Output

adg


Input

lllll
1


Output

lllll


Input

souuundhound
2


Output

suudon

### Response

```cpp
#include <bits/stdc++.h>

using namespace std;

int main() {

	string s;
	int n;
	cin >> s >> n;

	for(int i = 0; i < s.length(); i+=n) {
		cout << s[i];
	}

	printf("\n");

	return 0;
}
```