100900: [AtCoder]ABC090 A - Diagonal String
Description
Score : $100$ points
Problem Statement
We have a $3×3$ square grid, where each square contains a lowercase English letters. The letter in the square at the $i$-th row from the top and $j$-th column from the left is $c_{ij}$.
Print the string of length $3$ that can be obtained by concatenating the letters in the squares on the diagonal connecting the top-left and bottom-right corner of the grid, from the top-left to bottom-right.
Constraints
- Input consists of lowercase English letters.
Input
Input is given from Standard Input in the following format:
$c_{11}c_{12}c_{13}$ $c_{21}c_{22}c_{23}$ $c_{31}c_{32}c_{33}$
Output
Print the string of length $3$ that can be obtained by concatenating the letters on the diagonal connecting the top-left and bottom-right corner of the grid, from the top-left to bottom-right.
Sample Input 1
ant obe rec
Sample Output 1
abc
The letters in the squares on the diagonal connecting the top-left and bottom-right corner of the grid are a
, b
and c
from top-right to bottom-left. Concatenate these letters and print abc
.
Sample Input 2
edu cat ion
Sample Output 2
ean