Nifty!
perl dna TGAATCTTTGACTCGA
Hope I transcribed that correctly. I just hacked the following out of your code. Ugly, but does the job
#!/usr/bin/perl
# Run as dnareader.pl TCCCTCATTGAATCCAAACC
# You'll get a ++ from me if you can make it say "perl"
# instead.
for my $g1 ( 'A', 'C', 'T', 'G' ) {
for my $g2 ( 'A', 'C', 'T', 'G' ) {
for my $g3 ( 'A', 'C', 'T', 'G' ) {
for my $g4 ( 'A', 'C', 'T', 'G' ) {
print( "$g1$g2$g3$g4 - " );
letter( "$g1$g2$g3$g4" );
print "\n";
}}}}
sub letter {
$"='ATCG';
foreach (split '', shift) {
$;++;$,=$,<<2|index $",$_;
next if
$;&3;$,=print chr $,;$,--;
}
}
From there it's a simple matter of working backwards...
--g r i n d e r
TACCTGTTTGAGTGTAACAATCATTCGCTCGGTGTATCCATCTTTGACACAATCACTCGGTCTCTCCA
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