I am using Perl for string manipulation and that involves use of the reverse function and of tr to translate my string.
The script reads some strings and then performs following:

```
$revread = reverse($newword);
$revread =~ tr/TACGN/ATGCN/;

```

So the word is reversed and then gets translated--reverse complement.
I have following question:

What if

```
$revread=~ tr/TACG/ATGC/;

```

is used. In this case if "N" is found will it be skipped? as in tr I have nothing there to translate it to OR it will be printed as just as "N".