pod2usage(-msg => "Input file's suffix is neither sam nor bam!", -exitval => 2, -verbose => 2) if (($suf ne "sam") && ($suf ne "bam"));
my $isSam = ($suf eq "sam");
pod2usage(-msg => "Input file's suffix is neither sam nor bam!", -exitval => 2, -verbose => 2) if (($suf ne "sam") && ($suf ne "bam"));
my $isSam = ($suf eq "sam");