let h, w = Scanf.scanf " %d %d" @@ fun a b -> a, b
let sss = Array.init h @@ fun _ -> Array.init w @@ fun _ -> Scanf.scanf " %s" @@ fun s -> s
let _ =
  for i = 0 to h - 1 do
    for j = 0 to w - 1 do if sss.(i).(j) = "snuke" then Printf.printf "%c%d\n" (Char.chr @@ Char.code 'A' + j) @@ i + 1 done done