H, N = gets.split.map(&:to_i)
heights = (N - 1).times.map { gets.to_i }

heights << H
heights.sort!

rank = (N - heights.rindex(H)).to_s

case rank[-1]
when '1'
  puts rank + 'st'
when '2'
  puts rank + 'nd'
when '3'
  puts rank + 'rd'
else
  puts rank + 'th'
end