Requirements
1. As a user, I want to add combination so that I can build a list of combinations.
2. As a user, I want to categorize elements so that I can view them as a group.
3. As a user, I want to be able to remove combination that does not fit.
4. As a user, I want to be able to modify combination.
5. As a user, I want to see list of starting elements.
6. As a user, I want to see list of all unique elements in alphabetical order.
7. As a user, I want to be able to know whether the elements currently has 1 or more usage to unlock undiscovered elements.
8. As a user, I want to be able to input values into software which will auto-uppercase each word.

Doodle Sample Combination
Priest + House = Church
Man + Woman = Couple
Couple + Church = Marriage
Knowledge + Tree = Plant
Plant + Marriage = Flower
Flower + Flower = Bouquet