diff --git a/copycat/__init__.py b/copycat/__init__.py
index 14c0cc1..4e8bc55 100644
--- a/copycat/__init__.py
+++ b/copycat/__init__.py
@@ -1,2 +1,3 @@
 from .copycat import Copycat, Reporter  # noqa
 from .plot    import plot_answers
+from .io      import save_answers
diff --git a/copycat/io.py b/copycat/io.py
new file mode 100644
index 0000000..ae1185b
--- /dev/null
+++ b/copycat/io.py
@@ -0,0 +1,9 @@
+
+def save_answers(answers, filename):
+    answers = sorted(answers.items(), key=lambda kv : kv[1]['count'])
+    keys    = [k for k, v in answers]
+    counts  = [str(v['count']) for k, v in answers]
+    with open(filename, 'w') as outfile:
+        outfile.write(','.join(keys))
+        outfile.write('\n')
+        outfile.write(','.join(counts))
diff --git a/input/.placeholder b/input/.placeholder
new file mode 100644
index 0000000..e69de29
diff --git a/input/problems.csv b/input/problems.csv
new file mode 100644
index 0000000..3e941fa
--- /dev/null
+++ b/input/problems.csv
@@ -0,0 +1,9 @@
+abc,abd,ijk
+aabc,aabd,ijkk
+abc,abd,kji
+abc,abd,mrrjjj
+abc,abd,rssttt
+abc,abd,xyz
+abc,abd,ijjkkk
+rst,rsu,xyz
+abc,abd,xyyzzz
diff --git a/input/reduced_problems.csv b/input/reduced_problems.csv
new file mode 100644
index 0000000..f5fe027
--- /dev/null
+++ b/input/reduced_problems.csv
@@ -0,0 +1,4 @@
+abc,abd,ijk
+aabc,aabd,ijkk
+abc,abd,xyz
+abc,abd,ijjkkk
diff --git a/main.py b/main.py
index bae5ce0..3f197ee 100755
--- a/main.py
+++ b/main.py
@@ -35,8 +35,7 @@ final temperature of the workspace; lower means "more elegant".
 import argparse
 import logging
 
-from copycat import Copycat, Reporter, plot_answers
-
+from copycat import Copycat, Reporter, plot_answers, save_answers
 
 class SimpleReporter(Reporter):
     """Reports results from a single run."""
@@ -70,6 +69,8 @@ def main():
 
     if options.plot:
         plot_answers(answers, show=not options.noshow)
+    save_answers(answers, 'output/answers.csv')
+
 
 if __name__ == '__main__':
     main()