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#! /usr/bin/python3
import unittest
from math import sqrt
def cbs(*strs):
bss=map(bs,strs)
r=set()
f=False
for bsa in bss:
if (f):
s=set(bsa)
r=r & s
else:
r=set(bsa)
f=True
return sorted(r)
def bs(str):
sl=len(str)
f=dict()
for n in range(1,int(sqrt(sl))+1):
p=sl/n
if (p == int(p)):
f[n]=p
f[p]=n
out=list()
for l in sorted(f.keys()):
q=str[0:int(l)]
if (q * int(f[l]) == str):
out.append(q)
return out
class TestCbs(unittest.TestCase):
def test_bs1(self):
self.assertEqual(bs('abcdabcd'),['abcd','abcdabcd'],'bs-only 1')
def test_bs2(self):
self.assertEqual(bs('aaa'),['a','aaa'],'bs-only 2')
def test_ex1(self):
self.assertEqual(cbs('abcdabcd','abcdabcdabcdabcd'),['abcd','abcdabcd'],'example 1')
def test_ex2(self):
self.assertEqual(cbs('aaa','aa'),['a',],'example 2')
unittest.main()
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