Radix Sort
The next step is to do this again, using the
next letter     (do this in class)
Doing this we must keep the strings
within each group in the same relative
order as the previous result.
Next, we again combine these groups into
one result:
AAC, ABC, JBX, RDT, AEO, TLJ, RLT,
KLT, BWZ, XYZ