Mapping the source fields based on condition

Hi Guru's,

I need to map one filed based on some condition.

Suppose my source value for the 'field1' is abc-123 then I need to remove all the content before '-' and then map the rest of the content i.e 123.

Is this possible using graphical mapping (pls provide the screen shot), or do I need to write UDF, If yes pls provide example.

Input for field F1      Output should be

abc-123                    123

xyz-456                    456

pqr789                      pqr789

123-ijk                       ijk

Appreciate your help

Thanks

Arun