# -*- coding:utf-8 -*-
def add(n,i):
    return n+i
def test():
    for i in range(4):
        yield i
g = test()
for n in [1,10,5]:
    g=(add(n,i) for i in g)
# n=1
# g=(add(n,i) for i in g)
# n=10
# g=(add(n,i) for i in g=(add(n,i) for i in g))
# n=5
# g=(add(n,i) for i in (add(n,i) for i in g=(add(n,i) for i in test())))
#                                                  5           0 1 2 3
#                                             5 6 7 8
#                             5
#                             10 11 12 13
#          5
#          15 16 17 18
print(list(g))