# -*- 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]:
    g=(add(n,i) for i in g)
# n=1
# g=(add(n,i) for i in g)
# n=10
# g=(add(10,i) for i in g=(add(n,i) for i in test()))
#     20 21 22 23       /10 11 12 13       /0123/

print(list(g))