# A B の値を文字列で受け取る
a, b = gets(chomp: true).split

a_km = a.to_i
b_km = b.to_i * 60 * 60 / 1000.0

if a_km == b_km
  puts "same"
elsif a_km > b_km
  puts "KoD"
else a_km > b_km
  puts "blackyuki"
end