fun main() {
    val colors = listOf("Red", "Orange", "Yellow", "Green", "Cyan", "Blue", "Violet")
    val n = readLine()!!.toInt()
    val had = IntArray(7)
    readLine()!!.split(" ").forEach { had[colors.indexOf(it)]++ }
    readLine()!!.split(" ").forEach { had[colors.indexOf(it)]-- }
    for((index, value) in colors.withIndex()){
        if(had[index] == 1) println(value)
    }
}