p = io.read()
cnt = 0
for i = 1, 8 do
    s = io.read()
    for j = 1, 8 do
        a = string.sub(s, j, j)
        if(a ~= ".") then cnt = cnt + 1 end
    end
end
if(cnt % 2 == 0) then
    print(p)
else
    print(p == "oda" and "yukiko" or "oda")
end