I think the simplest way to get the output you want would be with this code:

print "rep1 rep2 rep3 product1 2 product2 2 product3 3 product4 4 prod
+uct5 5";
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Of course, this might not be useful for all input. Maybe if you gave us some clearer input parameters, possibly formatted with pre, and some idea of the rules you want to apply, we could suggest soemthing more generalized.