Hi guys,

I am trying to learn the song ilaya nila by Ilayaraja, but I don't know the key of the song. The chords are mostly C#m, B, A, G#. I don't know much about music and don't even know how to find the key of a song. I am just learning. I know my major scale triplets, and have planned to learn the song based on a few youtube videos and my knowledge of the major scale triplets. Please do help me in my endeavour and thanks in advance.