# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	S = input()
	cnt = 0
	for i in range(8):
		s = input()
		for j in s:
			if j != ".":
				cnt += 1

	if S == "oda":
		if cnt % 2 == 0:
			print("oda")
		else:
			print("yukiko")
	else:
		if cnt % 2 == 0:
			print("yukiko")
		else:
			print("oda")

	




if __name__ == '__main__':
	main()