let black = readLine()!
let white = black.prefix(1) == "o" ? "yukiko" : "oda"

var count = 0
for i in 1...8 {
    let line = readLine()!
    count += line.reduce(0, {$0 + ($1 != "." ? 1 : 0)})
}

if(count % 2  == 0) {
    print(black)
} else {
    print(white)
}