#!/usr/bin/perl
use warnings;


print("Please enter the first DNA sequence: ");
$DNAsequence1 = <STDIN>;
chomp($DNAsequence1);															
$DNAsequence1=uc($DNAsequence1);	
 $lengthDNA1=length $DNAsequence1;

print("\nPlease enter the second DNA sequenc (of same length as the first): ");
$DNAsequence2 = <STDIN>;
chomp($DNAsequence2);															
$DNAsequence2=uc($DNAsequence2);
$lengthDNA2=length $DNAsequence2;
#print "The length of DNA sequence 2 is $lengthDNA2";

	if ($lengthDNA1==$lengthDNA2){	
print "DNA sequence 1: $DNAsequence1\nDNA sequence 2: $DNAsequence2\n";
} else {
	print "\nThe DNA sequences are not of same lenght, please  try again!";
}

 @DNAsequence1=split(//,$DNAsequence1);
 @DNAsequence2=split(//,$DNAsequence2);


$score=0; 								


foreach $base1 (@$DNAsequence1)
print $score;
{
	foreach $base2(@$DNAsequence2)
	{
		if($base1->[0] eq $base2->[0])
		{
	$score += 3;
	print $score;
} else 
{
	$score=$score+1; 
	}
}
}
print $score;