Bip39-Master Some words are shorter than 4 letters, such as the word “act”. Other words are lengthier than four letters, such as “abstract”. Tip: A number of people highlight each and every 16th word inside of a printed wordlist to make block identification less difficult. This informative article describes BIP39, https://www.youtube.com/channel/UCUpxfyTJ0fb78SQ55hU6OCw