s=STDIN.gets.chomp

sum=0
8.times do |i|
	b=STDIN.gets.chomp
	8.times do |j|
		if b[j]!="."
			sum+=1
		end
	end
end
if s=="oda"
	if sum%2==0
		puts "oda"
	else
		puts "yukiko"
	end
else
	if sum%2==0
		puts "yukiko"
	else
		puts "oda"
	end
end