H, N = input().strip().split(' ')
H, N = int(H), int(N)

high = 1

for i in range(N - 1):
  tmp = int(input().strip())
  if tmp > H:
    high += 1

if high % 10 == 1:
  tmp = str(high) + 'st'
elif high % 10 == 2:
  tmp = str(high) + 'nd'
elif high % 10 == 3:
  tmp = str(high) + 'rd'
else:
  tmp = str(high) + 'th'

print(tmp)