There is probably a simple way to do this, but I'm drawing a blank:

I have an arbitrarily large input array, like

input = ['a','b','c','d','e','f','g']

and three target arrays like

targ_one = []
targ_two = []
targ_three = []

I want to deal out the elements of this array into three target arrays
so they end up like

['a','d','g']
['b','e']
['c','f']

It seems there should be an elegant way to do this, but I haven't hit
on it.  Suggestions would be welcome.