thresh P-value %words %seq Nwords Nseq total_words total_seq 8.3171 1.0e-05 24.0% 24.0% 12 12 50 50 7.3326 5.0e-05 30.0% 30.0% 15 15 50 50 6.8543 0.0001 32.0% 32.0% 16 16 50 50 5.5872 0.0005 34.0% 34.0% 17 17 50 50 4.963 0.001 40.0% 40.0% 20 20 50 50