#include <iostream>
using namespace std;

int main() {
	string s; int w; cin >> s >> w;
	string ans;
	for (int i = 0; i * w < s.length(); i++) {
		ans += s[i * w];
	}
	cout << ans << endl;

}
### Prompt

Develop a solution in cpp to the problem described below:

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 <iostream>
using namespace std;

int main() {
	string s; int w; cin >> s >> w;
	string ans;
	for (int i = 0; i * w < s.length(); i++) {
		ans += s[i * w];
	}
	cout << ans << endl;

}
```