fun main(args : Array<String>) {
    val (h, w) = readLine()!!.split(" ").map{it.toInt()}

    for (i in 0 until h) {
        val row = readLine()!!.split(" ")
        for (j in 0 until w) {
            if (row[j] == "snuke") {
                println("${(j+65).toChar()}${i+1}")
                return
            }
        }
    }
}