{"raw_statement":[{"iden":"problem statement","content":"On the Planet AtCoder, there are four types of bases: `A`, `C`, `G` and `T`. `A` bonds with `T`, and `C` bonds with `G`.\nYou are given a letter $b$ as input, which is `A`, `C`, `G` or `T`. Write a program that prints the letter representing the base that bonds with the base $b$."},{"iden":"constraints","content":"*   $b$ is one of the letters `A`, `C`, `G` and `T`."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$b$"},{"iden":"sample input 1","content":"A"},{"iden":"sample output 1","content":"T"},{"iden":"sample input 2","content":"G"},{"iden":"sample output 2","content":"C"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}