Replace 4 letters words beginning by c or finishing by n by coin

coinSpeech.sh

@@ -0,0 +1,5 @@
+#!/bin/bash
+
+sed -e "s/\<c\w\{3\}\>/coin/g" \
+    -e "s/\<\w\{3\}n\>/coin/g" \
+    $1

text.txt

@@ -0,0 +1 @@
+Hello boys, I need you to ceas this plan. This is a lion, your came is blue.