S = raw_input()
board = []

for x in range(8):
    T = list(raw_input())
    board.append(T)
cnt = 0
for y in range(8):
    for x in range(8):
        if (y == 3):
            if (x == 3 or x == 4):
                continue
        if (y == 4):
            if (x == 3 or x == 4):
                continue
        if (board[y][x] != '.'):
            cnt  += 1

if (cnt % 2 == 1):
    if (S == "yukiko"):
        print "oda"
    else:
        print "yukiko"
else:
    print S