H, N = map(int, input().split())
Hlist = sorted([int(input()) for i in range(N-1)])[::-1]
count = 1
for i in Hlist:
    if H < i:
        count += 1
    else:
        break
count = str(count)
if count[-1] == "1":
    print(count+'st')
elif count[-1] == "2":
    print(count+'nd')
elif count[-1] == "3":
    print(count+'rd')
else:
    print(count+'th')