Problem:
Score : 200 points

Problem Statement

You are given a string s consisting of lowercase English letters. Extract all the characters in the odd-indexed positions and print the string obtained by concatenating them. Here, the leftmost character is assigned the index 1.

Constraints

Each character in s is a lowercase English letter.

1≤|s|≤10^5

Input

The input is given from Standard Input in the following format:

s

Output

Print the string obtained by concatenating all the characters in the odd-numbered positions.

Sample Input 1

atcoder

Sample Output 1

acdr

Extract the first character a, the third character c, the fifth character d and the seventh character r to obtain acdr.

Sample Input 2

aaaa

Sample Output 2

aa

Sample Input 3

z

Sample Output 3

z

Sample Input 4

fukuokayamaguchi

Sample Output 4

fkoaaauh

Solution in Java (OpenJDK 11.0.6) (judge verdict: Wrong Answer)

import java.io.*;
public class Main {

	public static void main(String[] args)throws IOException {
		// TODO Auto-generated method stub
		BufferedReader br =new BufferedReader(new InputStreamReader(System.in));
		
		String StartString = br.readLine();
		char[]arr = StartString.toCharArray();
		for(int i =0; i<StartString.length(); i++) {
			if(i%2 == 0) {
				System.out.println(arr[i]);
			}
		}
		System.out.println();
	}

}