H, N = gets.split.map(&:to_i)
arr = [[-H, -1]]
(N-1).times do |i|
    h = gets.to_i
    arr.push([-h, i])
end
arr.sort!
N.times do |i|
    if arr[i][1] == -1
        ans = i+1
        print(ans)
        puts (case ans%10
        when 1
            "st"
        when 2
            "nd"
        when 3
            "rd"
        else
            "th"
        end)
        exit
    end
end