n = gets.chomp.split("")
check = 0
if n[0] == "k"
  if n[1] == "e" && n[2] == "y" && n[3] == "e" && n[4] == "n" && n[5] == "c" && n[6] == "e"
    puts "YES"
    exit
  end
  if n[1] == "e" && n[2] == "y" && n[3] == "e" && n[4] == "n" && n[5] == "c" && n[-1] == "e"
    puts "YES"
    exit
  end
  if n[1] == "e" && n[2] == "y" && n[3] == "e" && n[4] == "n" && n[-2] == "c" && n[-1] == "e"
    puts "YES"
    exit
  end
  if n[1] == "e" && n[2] == "y" && n[3] == "e" && n[-3] == "n" && n[-2] == "c" && n[-1] == "e"
    puts "YES"
    exit
  end
  if n[1] == "e" && n[2] == "y" && n[-4] == "e" && n[-3] == "n" && n[-2] == "c" && n[-1] == "e"
    puts "YES"
    exit
  end
  if n[1] == "e" && n[-5] == "y" && n[-4] == "e" && n[-3] == "n" && n[-2] == "c" && n[-1] == "e"
    puts "YES"
    exit
  end
  if n[-6] == "e" && n[-5] == "y" && n[-4] == "e" && n[-3] == "n" && n[-2] == "c" && n[-1] == "e"
    puts "YES"
    exit
  end
else
  if n[-7] == "k" && n[-6] == "e" && n[-5] == "y" && n[-4] == "e" && n[-3] == "n" && n[-2] == "c" && n[-1] == "e"
    puts "YES"
    exit
  end
end
puts "NO"
