#Add implement
def add(x,y):
    return x+y
#Subtract implement
def subtract(x,y):
    return x-y
#Multiply  implement
def multiply(x,y):
    return x*y
#Divide inplement
def divide(x,y):
    if y==0:
	return DIVIDE_BY_0_ERROR
    else:
	return x/y
print('Execution Successful')
