Which end to blow through depends on a number of factors.
What exactly is ailing the atty.
What are you trying to fix.
The phase of the moon.
Your annual income.
Your time zone in relation to atty's ailment.
Odd or even day of your mother's brother's cousin's best friend's employer's birthday.
Color of your dog (if a cat go by gender, all other pets determination by weight).
But what if you have both male and female cats... what then?!? lol
