#include <stdio.h>
#include <string.h>

int main(){
 char s[1001];
 int c;
 scanf("%s", s);
 scanf("%d", &c);
 
 for(int i = 0; i < strlen(s); i += c){
  printf("%c", s[i]);
 }
 return 0;
}
### Prompt

Please create a solution in cpp 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 <stdio.h>
#include <string.h>

int main(){
 char s[1001];
 int c;
 scanf("%s", s);
 scanf("%d", &c);
 
 for(int i = 0; i < strlen(s); i += c){
  printf("%c", s[i]);
 }
 return 0;
}
```