import scala.io.{StdIn => in}

object Main extends App {
  val Array(h, w) = in.readLine.split(" ").map(_.toInt)
  val table = Iterator.continually(in.readLine)
    .take(h)
    .map(_.split(" "))
    .toArray

  val res = for {
    i <- 0 until h
    j <- 0 until w
    if table(i)(j) == "snuke"
  } yield (i, j)

  val ans = "" + (res.head._2 + 'A').toChar + (res.head._1 + 1)
  println(ans)
}