#include<stdio.h>
int main(void){
	int w,i=0;
	char c[1000];
	scanf("%s %d", &c,&w);
	while (c[i] != '\0'){
		if (i % w == 0)printf("%c", c[i]);
		i++;
	}
	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<stdio.h>
int main(void){
	int w,i=0;
	char c[1000];
	scanf("%s %d", &c,&w);
	while (c[i] != '\0'){
		if (i % w == 0)printf("%c", c[i]);
		i++;
	}
	return 0;
}
```