diff --git a/README.md b/README.md
index f1da7fc..e68d53e 100644
--- a/README.md
+++ b/README.md
@@ -22,12 +22,12 @@ The attribute **id** of the **class** is the name of this class.
 The **parent** tag is optional. If present it *must* contain the **class** tag with the attribute **id** defining the name of the parent class.
 
 ## Exercise 1
-Create PHP program (to be launched from the command line) which takes as input the name of a XML file, reads the specified file and outputs the number of classes defined in the XML file.
+Create a PHP program (to be launched from the command line) which takes as input the name of a XML file, reads the specified file and outputs the number of classes defined in the XML file.
 
 When running your program against the provided **sample1.xml** file, the expected result is: 4. 
 
 ##  Exercise 2
-Create PHP program (to be launched from the command line) which takes as input a XML file, reads the specified file and outputs a PHP file containing a valid PHP declaration of all the classes defined in the given XML file.
+Create a PHP program (to be launched from the command line) which takes as input a XML file, reads the specified file and outputs a PHP file containing a valid PHP declaration of all the classes defined in the given XML file.
 
 Run your program against the provided **sample1.xml** and check that the result is a valid PHP file.