S =input()
if S.count("x")>7:
    print("NO")
else:
    print("YES") S =input() S input() input if S.count("x")>7:
    print("NO")
else:
    print("YES") S.count("x")>7 S.count("x") S.count S count "x" 7 print("NO") print "NO" print("YES") print "YES" S =input() input() S
S =input()
if S.count("x")>7:
    print("NO")
else:
    print("YES")