Score : 100 points
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.
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}
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.
ant obe rec
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
.
edu cat ion
ean