This seems similar to Multiple Approximate Pattern Matching Problem. Here's my solution: 
#!/usr/bin/perl
use warnings;
use strict;
use feature qw{ say };

chomp(my $text = <>);
my @patterns = split ' ', <>;
my $threshold = 0 + <>;

my @ctext = split //, $text;

my @results;
for my $pattern (@patterns) {
    my @cpat = split //, $pattern;
  POSITION:
    for my $pos (0 .. @ctext - @cpat) {
        my $mismatches = 0;
        for my $i (0 .. @cpat - 1) {
            if ($cpat[$i] ne $ctext[$pos + $i]) {
                next POSITION if ++$mismatches > $threshold;
            }
        }
        push @results, $pos;
    }
};

say join ' ', sort { $a <=> $b } @results;

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In reply to Re^2: search of a string in another string with 1 wildcard by choroba
in thread search of a string in another string with 1 wildcard by carolw

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