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

    var abc = arrayOf('2', '8', '3', '9', '7', '9')

    for (n in 1..N) {
        val ln = readLine()!!
        for (i in 0..4 step 2) {
            if (abc[i] == ln[0] && abc[i+1] == ln[2]) {
                abc[i] = ln[4]
                abc[i+1] = ln[6]
            }
        }
    }

    if (
        abc[0] == '5' && abc[1] == '8' && abc[2] == '4'
     && abc[3] == '8' && abc[4] == '6' && abc[5] == '8'
    ) {
        println("YES")
        return
    }
    println("NO")
}