One-third of the prime words are past participles [~/misc]$ cat primeWords.txt | tr -cs "[:alpha:]" "\n" | uniq | wc 2560 2560 21156 [~/misc]$

One-third of the prime words are past participles [~/misc]$ cat primeWords.txt | tr -cs "[:alpha:]" "\n" | uniq | wc 2560 2560 21156 [~/misc]$ cat primeWords.txt | tr -cs "[:alpha:]" "\n" | uniq | grep "ED$" | wc 843 843 7594