thresh P-value %words %seq Nwords Nseq total_words total_seq 7.7088 1.0e-05 5.6% 5.1% 2 2 36 39 6.7705 5.0e-05 5.6% 5.1% 2 2 36 39 6.567 0.0001 13.9% 12.8% 5 5 36 39 5.4214 0.0005 36.1% 33.3% 13 13 36 39 4.9056 0.001 41.7% 38.5% 15 15 36 39