in qmap3000 it's not necessary to compute the redundant 16-mers. This redundancy can be eliminated by using the map_size (3000) to determine if there will be any "overlapping" queries and to use therefore the earliest query if there is an overlap. Issue with this is that query_a will get its 3000, but query_b (contained within the 3000) may have additional targets beyond the query_a + 3000. #58