fun main()
{
    val N = readLine()!!.toInt()

    var abc = arrayOf(2 to 8, 3 to 9, 7 to 9)
    val invincible = arrayOf(5 to 8, 4 to 8, 6 to 8)

    repeat(N) {
        val xy: List<Int> = readLine()!!.split(" ").map { it.toInt() }
        for (i in abc.indices) {
            if (abc[i].first == xy[0] && abc[i].second == xy[1]) {
                abc[i] = Pair(xy[2], xy[3])
            }
        }
    }

    if (abc contentEquals invincible) {
        println("YES")
    } else {
        println("NO")
    }
}