un = input().split()
nam = int(un[0])
ans = 1
for i in range(int(un[1]) - 1):
    unnn = int(input())
    if unnn > nam:
        ans += 1
if str(ans)[-1] == "1":
    print(str(ans)+"st")
elif str(ans)[-1] == "2":
    print(str(ans)+"nd")
elif str(ans)[-1] == "3":
    print(str(ans)+"rd")
else:
    print(str(ans)+"th")