player=['oda','yukiko']
s=input()
b=[list(input()) for _ in range(8)]
cnt=0
for i in range(8):
    for j in range(8):
        if b[i][j]!='.':
            cnt+=1
if cnt%2==0:
    print(s)
else:
    for i in player:
        if i!=s:
            print(i)