Given a word, how you would spell it with element symbols from the periodic table? For instance, if given the string "Paper", you could return these symbols: Pa P Er (Protactinium, Phosphorus, Erbium).

------  ------  ------
| Pa |  | P  |  | Er | 
------  ------  ------

I'll give you a string, and you return a cell-array of strings. The answer is not always unique. I'll check that you use only element symbols, and that when they are glued together they spell the right string.

Examples

 'Paper'   => {'Pa','P','Er'}
 'America' => {'Am','Er','I','Ca'}
 'Paige'   => {'Pa','I','Ge'}

The test suite is case-insensitive. Only strings with possible solutions will be supplied.

(Thanks for the idea, Shriram!)