2 files changed, 71 insertions, 0 deletions
diff --git a/challenge-081/roger-bell-west/python/ch-1.py b/challenge-081/roger-bell-west/python/ch-1.py
new file mode 100755
index 0000000000..42f02ed19b
--- /dev/null
+++ b/challenge-081/roger-bell-west/python/ch-1.py
@@ -0,0 +1,48 @@
+#! /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()
diff --git a/challenge-081/roger-bell-west/python/ch-2.py b/challenge-081/roger-bell-west/python/ch-2.py
new file mode 100755
index 0000000000..eca8fb3cc3
--- /dev/null
+++ b/challenge-081/roger-bell-west/python/ch-2.py
@@ -0,0 +1,23 @@
+#! /usr/bin/python3
+
+import fileinput
+from itertools import chain
+
+c=dict()
+
+for line in fileinput.input():
+    line=line.rstrip("\r\n")
+    for rep in ('--',"'s",'.','"','(',')',','):
+        line=line.replace(rep,' ')
+    for word in line.split():
+        c.setdefault(word,0)
+        c[word] += 1
+
+f=dict()
+for w in sorted(c.keys()):
+    f.setdefault(c[w],list())
+    f[c[w]].append(w)
+
+for n in sorted(f.keys()):
+    print(' '.join((list(str(n)) + f[n])))
+    print('')