#include <iostream>
using namespace std;

char s[2100];
int w;
 
int main(){
  cin >> s >> w;
 int i = 0;
  while(s[i] != NULL){
  	cout << s[i];
    i += w;
  }
  cout << "\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 <iostream>
using namespace std;

char s[2100];
int w;
 
int main(){
  cin >> s >> w;
 int i = 0;
  while(s[i] != NULL){
  	cout << s[i];
    i += w;
  }
  cout << "\n";
  return 0;
}
```