I donât remember ever saying there were only four letter words, can you show me where I said that? 
So nostr:npub1mfndvgwstwm604jvrt07p6nyy898mdsdzzyumx9sdn8u6r4za4uqck6f8v posted "mother" as the 12th word, yet there's not even an "R" in his letter list.
This is disingenuous. I was under the impression his seed phrase was only 3 and 4 letter words, consisting of only the letters copied.
Not the first 3-4 letters of any length words.
This is impossible. He might as well not even have given letters. Total waste of time. I regret even engaging.
Discussion
Ah yes sorry I could have worded that better, although I did say first 4 in second sentence 
My original words are about a method:
1. among the 2048 words in BIP-39, cut the first 4 letters out first
2. delete all the words containing these 10 letters, leaving only about 600 candidate words.
3. to uniquely express 12 seed words, each taking the first 4 letters requires 48 letters. Only 46 are given here, so there are 2 words that are 3 letters long, and there are 10 words are 4 letters in length.
4. run a letter counting program for random combinations of 12 words on the compiled 600-length word list
It's hard to understand from these words that all seed words longer than 4 letters are excluded, right?