import sequtils, strutils
let
  s: string = stdin.readline
  b: seq[string] = mapIt(0..<8, stdin.readline)
  o: string = "oda"
  y: string = "yukiko"
var
  cnt: int = 0
  ans: string
for i in 0..<8:
  cnt += b[i].count(".")
if cnt mod 2 == 0:
  ans = if s == o: o else: y
else:
  ans = if s == o: y else: o
echo ans