My favorite song from the broadway musical Wicked is "For Good." The witches Elphaba and Glinda sing this the last time they see each other.
Here are some of the lyrics:
I've heard it said that people come into our lives for a reason
bringing something we must learn
And we are led to those who help us most to grow
If we let them and we help them in return
Well I don't know if I believe that that's true,
But I know I'm who I am today because I knew you.
. . .
Who can say if I've been changed for the better?
But because I knew you
I have been changed for good.
Also on the subject of the letter "F," I heart Fresca Peach.