Analyst

Ninja has given a list of unique words 'WORDS' of size 'N' and he wants to find all the words in the list formed after concatenating two or more words in the same list.

As Ninja's best friend, he asked you to help him with the above problem. So, your task is to find all words in the list which are formed after concatenating two or more words in the same list.

Print words in any order.

Note: One word can be concatenated multiple times. It is guaranteed that there is at least one word in the list, which is formed after concatenating two or more words.

Example:

Input: 'WORDS' = ["ninjas", "coding", "codingninjas"]
Output: ["codingninjas"]

Only word "codingninjas' is formed after concatenating two or more words in the list i.e "coding" and "ninjas".

Ninja has a number ‘N’. He wants to print the pattern in such a way that the outer rectangle is of the number ‘N’ and the number goes on decreasing as we move inside the rectangles.

For example, if ‘N’ = 4, then pattern will be:

4 4 4 4 4 4 4 
4 3 3 3 3 3 4 
4 3 2 2 2 3 4 
4 3 2 1 2 3 4 
4 3 2 2 2 3 4 
4 3 3 3 3 3 4 
4 4 4 4 4 4 4 

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