Help me in solving HTML06 problem

My issue

I write correct answer but the online editor can’t accept my answer.

My code

<P> This is my first para </P>

<h1> This is my biggest heading </h1>

<h4> This is a heading of another size </h4>

Learning course: Learn HTML / CSS
Problem Link: HTML Skeleton - Lets code Practice Problem in HTML / CSS - CodeChef

@bhavitj64
p tag should be in smaller case.