diff --git a/corpora/functions.py b/corpora/functions.py
new file mode 100644
index 0000000..301dd0b
--- /dev/null
+++ b/corpora/functions.py
@@ -0,0 +1,7 @@
+def f1(a):
+    return str(a)
+
+def f2(a):
+    return (lambda i: len(str(i)))(a)
+
+corpus = [f1, f2]