first = raw_input()
if first == "yukiko":
    second = "oda"
else:
    second = "yukiko"
fied = []
for i in range(0,8):
    fied.append(raw_input())
A = list("".join(fied))
if (A.count("w") + A.count("b")) % 2 ==1:
    print second
else:
    print first