How to insert greek characters in to vi editor

Hi,

I want to test a unix file by inserting greek characters in to vi editor.
Can anyone please suggest how to insert greek characters in to vi editor.

Did you find the answer to this issue? I always learnt that a combination of Alt or AltGr should be used and then some code consisting of digits. Can't find any resource and the closest I came on the web is this: Gentoo Linux Documentation -- Using UTF-8 with Gentoo

Press alt and the ascii number of the charecter like 254 and release alt
(254)
(252)
(210)

etc...