proper format for list of ip addresses to reject

it's not quite clear from the documentation...

if i set

sender_net_reject = /depot/exim/domains/net_reject

what is the format for the file?

Version A:

207.229.0.70/255.255.255.255:\
198.147.221.0/255.255.255.0:\
208.144.211.0/255.255.255.0:\
38.8.188.2/255.255.255.255

Version B:

207.229.0.70/255.255.255.255
198.147.221.0/255.255.255.0
208.144.211.0/255.255.255.0
38.8.188.2/255.255.255.255

thanks,
  richard
-- 
Richard Welty                     welty@???
http://www.inet-solutions.net/~welty/         888-311-INET