Shell script thing

prog2/wordle/thing.sh

@@ -2,6 +2,14 @@
 
 words=/usr/share/dict/words
 
+if [ -z "$2" ]
+then
+	echo "Usage: $ thing.sh (lower bound) (upper bound)"
+	echo "Example: $ thing.sh 0 1"
+	echo "The above example will output the best words that match first and second characters."
+	exit
+fi
+
 thing=$(ruby calc.rb $1 $2)
 fivewords=$(cat $words | awk '{print tolower($0)}' | grep -E '^[[:alpha:]]{5}$')