{"raw_statement":[{"iden":"problem statement","content":"AtCoder Inc. holds a contest every Saturday.\nThere are two types of contests called ABC and ARC, and just one of them is held at a time.\nThe company holds these two types of contests alternately: an ARC follows an ABC and vice versa.\nGiven a string $S$ representing the type of the contest held last week, print the string representing the type of the contest held this week."},{"iden":"constraints","content":"*   $S$ is `ABC` or `ARC`."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$S$"},{"iden":"sample input 1","content":"ABC"},{"iden":"sample output 1","content":"ARC\n\nThey held an ABC last week, so they will hold an ARC this week."}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}