my $match = "mme";
my $word = "bummer";

my $seek_pos = 2;
my $result;

# one way:
$result = ( index( $word, $match, $seek_pos ) == 0 ) ?
    "Got a match" : "Nada";

# another way:
$result = ( index( $word, $match ) == $seek_pos ) ?
    "Got a match" : "Nada";

print "$result\n";