Score : $200$ points
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 $1$.
The input is given from Standard Input in the following format:
$s$
Print the string obtained by concatenating all the characters in the odd-numbered positions.
atcoder
acdr
Extract the first character a
, the third character c
, the fifth character d
and the seventh character r
to obtain acdr
.
aaaa
aa
z
z
fukuokayamaguchi
fkoaaauh