There is more than one way to do it:

use Modern::Perl;

while (my $first = <DATA>) {
    my $second = <DATA>;
    chomp $first;
    chomp $second;
    say "Is >$first< equal to >$second<? ", ($first =~ m/^$\Qsecond\E$
+/i)?'Yes':'No';
}

__DATA__
test
TEST
testing
testing
TESTED
TESTED
TeStS
tEsTs
a Test
another Test
[download]

Output:

Is >test< equal to >TEST<? Yes
Is >testing< equal to >testing<? Yes
Is >TESTED< equal to >TESTED<? Yes
Is >TeStS< equal to >tEsTs<? Yes
Is >a Test< equal to >another Test<? No
[download]

Update: added the quotemeta tags \Q \E.</inq>

CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

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