thresh P-value %words %seq Nwords Nseq total_words total_seq 8.5474 1.0e-05 5.6% 5.1% 2 2 36 39 7.6754 5.0e-05 8.3% 7.7% 3 3 36 39 7.2592 0.0001 16.7% 15.4% 6 6 36 39 6.1332 0.0005 38.9% 35.9% 14 14 36 39 5.5327 0.001 41.7% 38.5% 15 15 36 39