{"problem":{"name":"Diagonal String","description":{"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 $c_{ij}$. Print the st","description_type":"Markdown"},"platform":"AtCoder","limit":{"time_limit":2000,"memory_limit":262144},"difficulty":"None","is_remote":true,"is_sync":true,"sync_url":null,"sign":"abc090_a"},"statements":[{"statement_type":"Markdown","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.\n\n## Constraints\n\n*   Input consists of lowercase English letters.\n\n## Input\n\nInput 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$c_{31}c_{32}c_{33}$\n\n[samples]","is_translate":false,"language":"English"}],"meta":{"iden":"abc090_a","tags":[],"sample_group":[["ant\nobe\nrec","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`."],["edu\ncat\nion","ean"]],"created_at":"2026-03-03 11:01:14"}}