#!/usr/bin/perl -w

use strict;

while (<DATA>)
{
   chomp;
   print "\n$_\n";

   /^(?=.*[a-z])(?=.*[A-Z])(?=.*\d).{6,9}$/ ?
      print "valid\n" :
         print "invalid (Input must have at least one lowercase-, " .
              "one uppercase-Char and one Number! (f.i.: \'12Three\')\n";

}
__DATA__
1245Za78
1245Za7b8
45a7b8
a78Z
12Three
kMdlOz
6KYX
diImMU1Y
ZNw4uWSht
jDqvSN
qVRR
le2WTQv
us1j3SerC
OZv0LtSJ
9qyscg
LbX7o74
80TeRHq
7YIiXnEV8
e1Yctl9
8iGoc
R87MeDCFz
ziTnlk
cziP