Alphnumeric Matching

[mrbbq]

Hello, I am trying to wrap my head around alphanumeric sorting and I have tried many of the things mentioned in past threads but I am still not having any luck. I want to eject tapes in order, they are labeled as such: B0001R B1001R B4356R etc. I have some code that I use to eject them now but they are not sorted and I want to sort them pre-eject so they come out in order. Below is the code:

        $ejected_tapes=0 ;
        #my @tapes_to_eject=sort @_ ;
        #Below works fine but tapes are not sorted
        my @tapes_to_eject=@_ ;
        #my @tapes_to_eject=sort { substr($a, 1) <=> substr($b, 1)} @_
+;
        # Test
        #print "@_";



        if ( $ejected_tapes == $maxslots ) {
                print "The export door in robot $robot_num only holds 
+$maxslots tape(s), \n";
                print "and we have now ejected that many tapes. Please
+ go and empty the\n";
                print "import/export doors and press <RETURN> when you
+'re finished";
                $ready=<STDIN>;
                $ejected_tapes=0;
                }
 
                `/usr/openv/volmgr/bin/vmchange -res -multi_eject -w -
+rn $robot_num -rt tld -rh $robot_host -ml $\@_[0]:$\@_[1]:$\@_[2]:$\@
+_[3]:$\@_[4]:$\@_[5]:$\@_[6]:$\@_[7]:$\@_[8]:$\@_[9]:$\@_[10]:$\@_[11
+]:$\@_[12]:$\@_[13]:$\@_[14]:$\@_[15]:$\@_[16]:$\@_[17]:$\@_[18]:$\@_
+[19]:$\@_[20]:$\@_[21]:$\@_[22]:$\@_[23]:$\@_[24]:$\@_[25]:$\@_[26]:$
+\@_[27]:$\@_[28]:$\@_[29]:$\@_[30]:$\@_[31]:$\@_[32]:$\@_[33]:$\@_[34
+]:$\@_[35]:$\@_[36]:$\@_[37]:$\@_[38]:$\@_[39]:$\@_[40]:$\@_[41]:$\@_
+[42]:$\@_[43]:$\@_[44]:$\@_[45]:$\@_[46]:$\@_[47]:$\@_[48]:$\@_[49]:$
+\@_[50]:$\@_[51]` ;

}

Thanks for looking and sorry if this is noob sauce.