import bisect
h,n=map(int,input().split())
s=sorted(int(input()) for _ in range(n-1))
t=str(len(s)-bisect.bisect_right(s,h)+1)
if t[-1]=='1':
    print(t+'st')
elif t[-1]=='2':
    print(t+'nd')
elif t[-1]=='3':
    print(t+'rd')
else:
    print(t+'th')