#! perl -slw
use strict;

my @city = split ' ', <DATA>;
my @temp = split ' ', <DATA>;
my @note = split ' ', <DATA>;

my $i = '01';
for my $city ( @city ) {
    for my $temp ( @temp ) {
        for my $note ( @note ) {
            open O, '>', 'out' .  $i++ or die $!;
            print O 'city: ', $city;
            print O 'weather: ', $temp;
            print O 'recommended: ', $note;
            close O;
        }
    }
}

__DATA__
Jakarta paris delhi singapore
hot cold wet
yes no cannotcomment

##</code><code>##

C:\test>type out*

out01


city: Jakarta
weather: hot
recommended: yes

out02


city: Jakarta
weather: hot
recommended: no

out03


city: Jakarta
weather: hot
recommended: cannotcomment

out04


city: Jakarta
weather: cold
recommended: yes

out05


city: Jakarta
weather: cold
recommended: no

out06


city: Jakarta
weather: cold
recommended: cannotcomment

out07


city: Jakarta
weather: wet
recommended: yes

out08


city: Jakarta
weather: wet
recommended: no

out09


city: Jakarta
weather: wet
recommended: cannotcomment

out10


city: paris
weather: hot
recommended: yes

out11


city: paris
weather: hot
recommended: no

out12


city: paris
weather: hot
recommended: cannotcomment

out13


city: paris
weather: cold
recommended: yes

out14


city: paris
weather: cold
recommended: no

out15


city: paris
weather: cold
recommended: cannotcomment

out16


city: paris
weather: wet
recommended: yes

out17


city: paris
weather: wet
recommended: no

out18


city: paris
weather: wet
recommended: cannotcomment

out19


city: delhi
weather: hot
recommended: yes

out20


city: delhi
weather: hot
recommended: no

out21


city: delhi
weather: hot
recommended: cannotcomment

out22


city: delhi
weather: cold
recommended: yes

out23


city: delhi
weather: cold
recommended: no

out24


city: delhi
weather: cold
recommended: cannotcomment

out25


city: delhi
weather: wet
recommended: yes

out26


city: delhi
weather: wet
recommended: no

out27


city: delhi
weather: wet
recommended: cannotcomment

out28


city: singapore
weather: hot
recommended: yes

out29


city: singapore
weather: hot
recommended: no

out30


city: singapore
weather: hot
recommended: cannotcomment

out31


city: singapore
weather: cold
recommended: yes

out32


city: singapore
weather: cold
recommended: no

out33


city: singapore
weather: cold
recommended: cannotcomment

out34


city: singapore
weather: wet
recommended: yes

out35


city: singapore
weather: wet
recommended: no

out36


city: singapore
weather: wet
recommended: cannotcomment