diff --git a/02_word_freq/src/wordify.sh b/02_word_freq/src/wordify.sh
new file mode 100755
index 0000000..34b3937
--- /dev/null
+++ b/02_word_freq/src/wordify.sh
@@ -0,0 +1,19 @@
+#! /bin/bash
+
+# concatenate all input files
+cat $* |
+
+# remove BOM from UTF-8
+sed '1 s/^\xef\xbb\xbf//' |
+
+# remove punctuation 
+tr --delete "[:punct:]" |
+
+# move words in separate lines
+tr "[:space:]" "\n" |
+
+# remove empty lines
+tr --squeeze-repeats "\n" |
+
+# make lower case
+tr "[:upper:]" "[:lower:]"