Build a hash with date and ip adress as key,and keep the values in an array After reading the first two entries the hash would look like this,

%myhash{
"01 Jul 2007,221.6.19.196"=>[9,19],
"01 Jul 2007,221.6.19.197"=>[1,3]
}
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Now the third ipaddress and date is same as first one,so add up the new values with the already existing values.Once you have parsed the entire list,can get you o/p by printing the key's and value's of the array.Please throw in some sentences on you next post's, your post looks like a command to a computer ;)