def sub_sum(l):
x = []
y = []
for i in range(len(l)):
if i % 2 ==0:
x.append(l[i]*l[i])
else:
y.append(l[i]*l[i])
print("奇数位平方和为{0},\n偶数位平方和为{1}".format(sum(x),sum(y)))
sub_sum([1,2,3,4])
names=['Alice','Bob','David','Ellena']
news=['Zero','Phoebe','Gen']
news.sort()
print(news)
count=len(names)
for n in news:
names.insert(count,n)
count+=1
print(names)
