{"raw_statement":[{"iden":"problem statement","content":"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 $c_{ij}$.\nPrint 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."},{"iden":"constraints","content":"*   Input consists of lowercase English letters."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$c_{11}c_{12}c_{13}$\n$c_{21}c_{22}c_{23}$\n$c_{31}c_{32}c_{33}$"},{"iden":"sample input 1","content":"ant\nobe\nrec"},{"iden":"sample output 1","content":"abc\n\nThe 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`."},{"iden":"sample input 2","content":"edu\ncat\nion"},{"iden":"sample output 2","content":"ean"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}