#!/usr/bin/python3

def meg_per(x,y,z):
	per=[n for n in (x,y,z) if n%2!=0]

	if not per:
		print("den exei peritous")
		exit(1)
	return max(per)

def main():
	x=int(input("x: "))
	y=int(input("y: "))
	z=int(input("z: "))

	print(meg_per(x,y,z))

if __name__=="__main__":
	main()