Added candidate delete to remove duplicates.

Fixes #122
```
   ____  U _____ u  _____         U  ___ u   _   _  _____   
U /"___|u\| ___"|/ |_ " _|         \/"_ \/U |"|u| ||_ " _|  
\| |  _ / |  _|"     | |           | | | | \| |\| |  | |    
 | |_| |  | |___    /| |\      .-,_| |_| |  | |_| | /| |\   
  \____|  |_____|  u |_|U       \_)-\___/  <<\___/ u |_|U   
  _)(|_   <<   >>  _// \\_           \\   (__) )(  _// \\_  
 (__)__) (__) (__)(__) (__)         (__)      (__)(__) (__) 
```