import sequtils,strutils
var
    s = stdin.readline
    b : string
    cnt = 0
    n = ["oda", "yukiko"]
if s == "oda":
    cnt = 0
else:
    cnt = 1
for i in 0..7:
    b = stdin.readline
    cnt += b.count('.')
b = n[(cnt and 1)]

echo b