{"raw_statement":[{"iden":"problem statement","content":"Takahashi wants to be a member of some web service.\nHe tried to register himself with the ID $S$, which turned out to be already used by another user.\nThus, he decides to register using a string obtained by appending one character at the end of $S$ as his ID.\nHe is now trying to register with the ID $T$. Determine whether this string satisfies the property above."},{"iden":"constraints","content":"*   $S$ and $T$ are strings consisting of lowercase English letters.\n*   $1 \\leq |S| \\leq 10$\n*   $|T| = |S| + 1$"},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$S$\n$T$"},{"iden":"sample input 1","content":"chokudai\nchokudaiz"},{"iden":"sample output 1","content":"Yes\n\n`chokudaiz` can be obtained by appending `z` at the end of `chokudai`."},{"iden":"sample input 2","content":"snuke\nsnekee"},{"iden":"sample output 2","content":"No\n\n`snekee` cannot be obtained by appending one character at the end of `snuke`."},{"iden":"sample input 3","content":"a\naa"},{"iden":"sample output 3","content":"Yes"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}