#!/usr/local/lib/python3
def gen(word):
try:
i += 1
except:
i = 0
yield word[i]
for letter in gen('sergey'):
print(letter)
IyEvdXNyL2xvY2FsL2xpYi9weXRob24zCgpkZWYgZ2VuKHdvcmQpOgogIHRyeToKICAgIGkgKz0gMQogIGV4Y2VwdDoKICAgIGkgPSAwCgogIHlpZWxkIHdvcmRbaV0KCgpmb3IgbGV0dGVyIGluIGdlbignc2VyZ2V5Jyk6CiAgcHJpbnQobGV0dGVyKQ==