def f(x):
    return x*x

def h(x):
    return x - 5

g = f
print g(10)

fun = [f, g, h]
print "List start"
for i in fun:
    print i(10)

def j():
    return f

print j()(57)

def k():
    return j

print k()()(39)

def call_on_40(f):
    return lambda x : f(40 / x)

fun.append(call_on_40(h))

for i in fun:
    print i(10)