myHeight = list(map(int, input().split()))
heights = list(map(int, [input() for i in range(myHeight[1] - 1)]))
heights.append(int(myHeight[0]))
heights.sort()
value = myHeight[1] - heights.index(myHeight[0])
if value == 1:
	print("1st")
elif value == 2:
	print("2nd")
elif value == 3:
	print("3rd")
else:
	print(str(value)+"th")