import sys
input=lambda: sys.stdin.readline().rstrip()
s=input()
ct=-4
for _ in range(8):
  b=input()
  for bb in b:
    if bb!=".":
      ct+=1
if s=="oda":
  ss="yukiko"
else:
  ss="oda"
if ct%2:
  print(ss)
else:
  print(s)