from collections import *
from functools import *
from heapq import *
from itertools import *
import sys, math,random

h,n = map(int,input().split())
H = [int(input()) for _ in range(n-1)]
H += [h]
H.sort(reverse=True)
suffix = defaultdict(lambda:'th')
suffix[1] = 'st'
suffix[2] = 'nd'
suffix[3] = 'rd'
for i,_h in enumerate(H):
    if _h==h:
        print(f"{i+1}{suffix[i+1]}")
        exit()