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.

s = input()
a = 0

for i in s:
    a += 1 if i == 'o' else 0

if a >= 8:
    print('YES')
else:
    print('NO')

s = input()
print('YES' if s.count('o') - len(s) >= -7 else 'NO')