Generate Every Possible 2 Character Combination : <p>How can I generate a string that contains a every 2 character combination of input ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789</p>

<p>Output would be formatted like this:</p>

<pre><code>00
01
02
03
04
05
06
07
08
09
0A
0B
0C
0D
...
2g
2h
2i
2j
2k
2l
2m
2n
2o
2p
2q
2r
2s
2t
2u
2v
2w
2x
2y
2z
30
31
32
33
34
35
36
37
38
39
3A
3B
3C
</code></pre>

<p>The total length of the output would be 3844 lines.</p>
