open my $test, '<', 'test.txt' or die "Can't open file: $!";
while (my $line = <$test>) {
    # chomp not needed with split on ' '.
    my ($pattern, $cyclo, $group) = split ' ', $line, 4;
    print $line if 'FOLDING' eq $pattern
                && 'SHAPE'   eq $cyclo
                && 'OXYGEN'  eq $group;
    }
}
[download]

($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,
[download]