Getting values out of a CSV

[CarpeSkium at gmail.com]

How do I access the value in the second row in the first position of a
CSV? Or the 3rd row, in the fifth position?

a,b,c,d,e,f,g,h,i
j,k,l,m,n,o,p,q,r
r,s,t,v,w,x,y,z

I'd want to get at "j" and "w". I know I can do

import csv
reader = csv.reader(open("some.csv", "rb"))
for row in reader:
print row[0]

to get the first value in EVERY row, but I don't want that. Thanks for
the help.