練習問題
a = 'abcdefghijklmnopqrstuvwxyz .,-'
s = 'qdq-gi.q-a ziatmxxitmdqibtqi-ustbi ri.qmoqrcxi.qbubu zir -ibtqi-qp-qaai ripmymsqkir -ibtqi-qy dmxi ri.cnxuoi rruoumxakir -ibtqiqzmobyqzbkii-q.qmxi -imyqzpyqzbi rixmeaki -puzmzoqai -i-qscxmbu zaimzpir -i btq-iymbbq-a;iz -iatmxximzgi.q-a zinqiuzimzgiemgipuao-uyuzmbqpimsmuzabir -ia. za -uzsiacotiimi.qbubu zj'
for i in xrange(1, len(a)):
candidate = ''
for e in s:
if e == ';':
candidate += ';'
else:
candidate += a[(a.find(e) + i) % len(a)]
if 'person' in candidate:
print candidate
break
