import strutils

const n = 8
var cnt = 0

let
  member = ["yukiko", "oda"]
  blk = stdin.readLine
  wht = member[int(blk == member[0])]


for i in 0 ..< n:
  let s = stdin.readLine
  cnt += s.count('b') + s.count('w')


echo if cnt mod 2 == 0: blk else: wht