def function1():
	print('no return')

def function2():
	print('no return')
	return

def function3():
	print('return bool')
	return True;

def function4():
	print('return tuple')
	return (1,2)

def function5():
	print('return tuple')
	return 1,2

function1()
function2()
function3()
function4()
function5()