H, N = gets.split.map(&:to_i)
arr = []
(N-1).times do
  arr.push(gets.to_i)
end
str = (arr.push(H).sort{|a,b| b <=> a}.index(H) + 1).to_s
case str[-1].to_i
when 1
  x="st"
when 2
  x="nd"
when 3
  x="rd"
else
  x="th"
end
print str+x