{"raw_statement":[{"iden":"problem statement","content":"In AtCoder City, there are three stations numbered $1$, $2$, and $3$.\nEach of these stations is operated by one of the two railway companies, A and B. A string $S$ of length $3$ represents which company operates each station. If $S_i$ is `A`, Company A operates Station $i$; if $S_i$ is `B`, Company B operates Station $i$.\nTo improve the transportation condition, for each pair of a station operated by Company A and one operated by Company B, there will be a bus service connecting them.\nDetermine if there is a pair of stations that will be connected by a bus service."},{"iden":"constraints","content":"*   Each character of $S$ is `A` or `B`.\n*   $|S| = 3$"},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$S$"},{"iden":"sample input 1","content":"ABA"},{"iden":"sample output 1","content":"Yes\n\nCompany A operates Station $1$ and $3$, while Company B operates Station $2$.\nThere will be a bus service between Station $1$ and $2$, and between Station $2$ and $3$, so print `Yes`."},{"iden":"sample input 2","content":"BBA"},{"iden":"sample output 2","content":"Yes\n\nCompany B operates Station $1$ and $2$, while Company A operates Station $3$.\nThere will be a bus service between Station $1$ and $3$, and between Station $2$ and $3$, so print `Yes`."},{"iden":"sample input 3","content":"BBB"},{"iden":"sample output 3","content":"No\n\nCompany B operates all the stations. Thus, there will be no bus service, so print `No`."}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}