#!/perl/bin/perl
use strict;
use warnings;

my $fname = "Designations.txt";
open (my $fh, '<', $fname) or die "Couldn't open file $fname, $!";
my %designation;
while (<$fh>) {
    my ($SLNO, $first, $last, $desig) = split /\s+/;
    $designation{$first} = $desig;
    $designation{$last} = $desig;
}
print "Enter First Name or Last Name: \n \n";
chomp(my $name = <STDIN>);
print "Entered name is : $name \n";
print "Designation is : $designation{$name}\n";