$ perl 1119397.pl
APPLE
        Values added   :
        Values removed : FRITTER
        Values retained:
B23163
        Values added   : Yellow
        Values removed : Black, White
        Values retained: Blue, Green, Orange, Red
B23167
        Values added   : 5, 6
        Values removed :
        Values retained: 23, Carphone Warehouse TalkTalk
B23168
        Values added   : DEF, EFG
        Values removed :
        Values retained: ABC, AOL
B23970
        Values added   : 56
        Values removed :
        Values retained: O2
PONY
        Values added   : EARTH
        Values removed :
        Values retained:
permitted_mac_attempts
        Values added   : 34, 4
        Values removed :
        Values retained: 1, DEF
$