(define s (read-line))
(define count 0)
(define b "")
(let loop((i 8))
	(set! b (read-line))
	(if (or (char=? (string-ref b 0) #\b) (char=? (string-ref b 0) #\w))
		(set! count (+ count 1)))
	(if (or (char=? (string-ref b 1) #\b) (char=? (string-ref b 1) #\w))
		(set! count (+ count 1)))
	(if (or (char=? (string-ref b 2) #\b) (char=? (string-ref b 2) #\w))
		(set! count (+ count 1)))
	(if (or (char=? (string-ref b 3) #\b) (char=? (string-ref b 3) #\w))
		(set! count (+ count 1)))
	(if (or (char=? (string-ref b 4) #\b) (char=? (string-ref b 4) #\w))
		(set! count (+ count 1)))
	(if (or (char=? (string-ref b 5) #\b) (char=? (string-ref b 5) #\w))
		(set! count (+ count 1)))
	(if (or (char=? (string-ref b 6) #\b) (char=? (string-ref b 6) #\w))
		(set! count (+ count 1)))
	(if (or (char=? (string-ref b 7) #\b) (char=? (string-ref b 7) #\w))
		(set! count (+ count 1)))
	(if (> i 1) (loop (- i 1))))
(if (= (modulo count 2) 0)
	(display s)
	(display (if (string=? s "oda") "yukiko" "oda")))