h, n = map(int, input().split())
hights = []

for i in range(n-1):
    hights.append(int(input()))

hights.sort(reverse=True)

number = 1
for hight in hights:
    if h > hight:
        break
    number += 1

if number == 1:
    print(str(number) + 'st')
elif number == 2:
    print(str(number) + 'nd')
elif number == 3:
    print(str(number) + 'rd')
else:
    print(str(number) + 'th')