x=input()
data = [input() for i in range(8)]
name=['oda','yukiko']

if x==name[0]:
  first=name[0]
  second=name[1]
else:
  first=name[1]
  second=name[0]

c=0
for i in range(8):
  for j in range(8):
    if data[i][j]!='.':
      c+=1

if c%2==0:
  print(first)
else:
  print(second)