How can i import my hotmail address book to yahoo?

I have done it individually with copy paste. Not much luck for quick short cuts had some corrupted files.
How can i import my hotmail address book to yahoo?
i think u can first export hotmail contacts as a spreadsheet, save the spreadsheet on ur computer and then import the spreadsheet into ur yahoo account. Ive done hotmail to gmail transfer this way but im not sure if yahoo works the same way.