# -*- coding: utf-8 -*-
import sys
def main():
    
    h, m = [int(i) for i in sys.stdin.readline().split()]
    l = [int(sys.stdin.readline()) for _ in range(m - 1)]
    l.append(h)
    n = sorted(l, reverse=True)
    
    result = 0
    for i in range(len(n)):
        if n[i] == h:
            result = i + 1
            break
    
    s = str(result)[-1]
    t = ""
    if s == "1":
        t = "st"
    elif s == "2":
        t = "nd"
    elif s == "3":
        t = "rd"
    else:
        t = "th"
    
    print(str(result) + t)

if __name__ == '__main__':
    main()