{"raw_statement":[{"iden":"problem statement","content":"Takahashi is competing in a sumo tournament. The tournament lasts for $15$ days, during which he performs in one match per day. If he wins $8$ or more matches, he can also participate in the next tournament.\nThe matches for the first $k$ days have finished. You are given the results of Takahashi's matches as a string $S$ consisting of `o` and `x`. If the $i$\\-th character in $S$ is `o`, it means that Takahashi won the match on the $i$\\-th day; if that character is `x`, it means that Takahashi lost the match on the $i$\\-th day.\nPrint `YES` if there is a possibility that Takahashi can participate in the next tournament, and print `NO` if there is no such possibility."},{"iden":"constraints","content":"*   $1 \\leq k \\leq 15$\n*   $S$ is a string of length $k$ consisting of `o` and `x`."},{"iden":"input","content":"Input is given from Standard Input in the following format:\n\n$S$"},{"iden":"sample input 1","content":"oxoxoxoxoxoxox"},{"iden":"sample output 1","content":"YES\n\nTakahashi has $7$ wins and $7$ losses before the last match. If he wins that match, he will have $8$ wins."},{"iden":"sample input 2","content":"xxxxxxxx"},{"iden":"sample output 2","content":"NO"}],"translated_statement":null,"sample_group":[],"show_order":["default"],"formal_statement":null,"simple_statement":null,"has_page_source":true}