m
t
cut -c 1-4 <english.txt | grep -E "^[$SCRAMBLED]+$" | grep -Ev 'm.*m|t.*t' | wc 574 574 2833
FractalEncrypt said he got the list of words down to 547 and I'm not at all sure why he got that number of words.
m
s ort
s. These can also be filtered, resulting in 574 possible words: