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Word Set Square

## Challenge

Given a string, e.g. `Hello`, do the following:

Mirror it:

```
Hello -> HelloolleH
```

and create a right triangle using it as the sides:

```
H         
ee        
l l       
l  l      
o   o     
o    o    
l     l   
l      l  
e       e 
HelloolleH
```
Which looks sort of like a set square.

That's it!

## Scoring

This is code-golf. Shortest answer in each language wins.