Partial-2

def a(x):
    def b(y):          
        return x + y       
    return b         
def c(f,g):
    return f(g)    # return an address with a function together with a closure
add10 = a(10)
add20 = a(20)
print(add10(5), add20(5))
print(a(10)(5),a(20)(5))   
print(c(add10, 10))
print(c(add20, 10))