from bisect import bisect_left
h,n=map(int,input().split())
l=sorted(int(input()) for _ in range(n-1))
v=n-bisect_left(l,h)
s="st" if v%10==1 else "nd" if v%10==2 else "rd" if v%10==3 else "th"
print(str(v)+s)