thresh P-value %words %seq Nwords Nseq total_words total_seq 7.9089 1.0e-05 5.9% 4.7% 2 2 34 43 7.154 5.0e-05 8.8% 7.0% 3 3 34 43 6.7348 0.0001 11.8% 9.3% 4 4 34 43 5.6101 0.0005 50.0% 37.2% 17 16 34 43 5.0124 0.001 58.8% 46.5% 20 20 34 43