Score : 200 points
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.
The 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.
Print YES
if there is a possibility that Takahashi can participate in the next tournament, and print NO
if there is no such possibility.
o
and x
.Input is given from Standard Input in the following format:
S
Print YES
if there is a possibility that Takahashi can participate in the next tournament, and print NO
otherwise.
oxoxoxoxoxoxox
YES
Takahashi has 7 wins and 7 losses before the last match. If he wins that match, he will have 8 wins.
xxxxxxxx
NO