H, N = map(int, input().split())

h = [None] * N
h[0] = H
for i in range(1, N):
    h[i] = int(input())
h.sort(reverse=True)
x = str(h.index(H) + 1)[-1]

if x == 1:
    print('{}st'.format(x))
elif x == 2:
    print('{}nd'.format(x))
elif x == 3:
    print('{}rd'.format(x))
else:
    print('{}th'.format(x))