diff --git a/README.md b/README.md
index 6aedb72..66d3c77 100644
--- a/README.md
+++ b/README.md
@@ -1,81 +1,14 @@
-# Python teach and learn
+# 0.2.1_hello-world
 
-This is a repository to teach and learn Python.
+The main topic of this branch is to practice with GitHub.
 
-If you are a teacher, you can use all the exercises on this repo for your own purpose:
-teach some concept, exams, etc.
-
-As a student take a look to the explanations below.
-
-## Requirements
-
-* Python >= 3.6.
-* Git installed.
-* A GitHub account.
-
-## Repo structure
-
-On master you only have a few files, every exercise is inside his own branch.
-
-Every branch has a name with index + what we learn.
-For example the first branch is `0_hello-world`.
-Also, we have modifications to the main exercise on a branch, example: `0.1_hello-someone`.
-This modifications add more complexity to the main problem like is usually done on [code katas](https://en.wikipedia.org/wiki/Kata#Outside_martial_arts).
-
-> Katas starts with a simple problem and will be more complicated on every step
-
-## Step by step guide
-
-If you fork this repo, never update the original branches because you could have conflicts in the future. Instead of that, create new branches.
-
-### Step 0: Read it
-
-Yes, this should be your first step, read this README and, of course, we start with 0 not 1.
-If you do not know why, we will see it in the future, be patient.
-
-### Step 1: Fork
-
-You should fork this repo and then start working with it.
-How? We will see a step by step guide with git commands.
-
-If you use another tool like GitHub Desktop take a look to their docs.
-
-![fork button](docs/images/fork-btn.jpg)
-
-### Step 2: Setup the upstream
-
-This step is required to have the latests updates from the main repo in your forked one.
-
-When you setup this you will be able to:
-
-1. Update the master branch of your forked repo.
-2. Get any new branch created from the main repo.
-
-#### Add upstream remote origin
+## Create your own branch
 
 ```shell
-git remote add upstream git@github.com:mrroot5/python-teach-learn.git
+git checkout -b 0.2.1_hello-world_jhon-doe
 ```
 
-#### Update branches
+## Start coding
 
-This could be done with the fetch button on GitHub:
-
-![fetch button](docs/images/fetch-upstream-btn.jpg)
-
-Or with a git command:
-
-```shell
-git pull upstream master
-```
-
-Simply change master for the branch you want.
-On GitHub you must change to a new branch to have the option to fetch it.
-
-#### Update list of branches
-
-I do not know if GitHub have an option to do this so, this is the command:
-
-```shell
-git fetch upstream
-```
+From the version 0.2 now allow only string as user input, of course, if the user introduces an int
+or other not allowed value, show a message explaining the error and how to use this script.
diff --git a/main.py b/main.py
new file mode 100644
index 0000000..75b18a5
--- /dev/null
+++ b/main.py
@@ -0,0 +1,8 @@
+# Import modules if required
+
+# Create functions or classes to accomplish your task
+
+if __name__ == '__main__':
+    # Do here the main things to accomplish your task
+    # For example: call functions to process an input data
+    pass  # this could be removed