#!/usr/bin/python3
def main():
	x=None
	y=None
	try:
		x=input("Dose x:")
		y=input("Dose y:")
		z=eval(x) + eval(y)
		print(f'x+y={z}')
	except Exception as e:
		print("Exception 1:",str(e))
	#	exit(1)
	finally:
		print("go on")
if __name__=="__main__":
	main()