H, N = map(int, input().split())
s = [int(input()) for _ in range(N-1)]

aft = ["st", "nd", "rd", "th"]

l = s + [H]
l.sort()
idx = l.index(H)

last = idx % 10
idx = str(idx)
if last == 1:
    print(idx+aft[0])
elif last == 2:
    print(idx+aft[1])
elif last == 3:
    print(idx+aft[2])
else:
    print(idx+aft[3])