I have some data in the format below and would like to change it to date fromat for calculation purposes:

F15 - Oct
F15 - Feb
F15 - Oct
F15 - April
F15 - Oct
F15 - Nov

I would like to change the text above to date format, however it needs to be 2014 if the months are F15 - May thru December and 2015 if it is F15 January thru April. Thus, F15 Oct should read Oct-14 and F15 - Jan would read Jan - 15. I used the formula =Right(A2, LEN(A2)-3), to remove the F15, however can't seem to combine it with an if statement to create the date as It doesn't work or I get an error.

Thanks.