import sys
s = sys.stdin.readline().rstrip()
if len([y for y in s if y == 'x']) >= 8:
  print('NO')
else:
  print('YES') import sys sys s = sys.stdin.readline().rstrip() s sys.stdin.readline().rstrip() sys.stdin.readline().rstrip sys.stdin.readline() sys.stdin.readline sys.stdin sys stdin readline rstrip if len([y for y in s if y == 'x']) >= 8:
  print('NO')
else:
  print('YES') len([y for y in s if y == 'x']) >= 8 len([y for y in s if y == 'x']) len [y for y in s if y == 'x'] 8 print('NO') print 'NO' print('YES') print 'YES' s = sys.stdin.readline().rstrip() sys.stdin.readline().rstrip() s
import sys
s = sys.stdin.readline().rstrip()
if len([y for y in s if y == 'x']) >= 8:
  print('NO')
else:
  print('YES')