Bip39 Mnemonic Phrase Some words are shorter than 4 letters, like the word “act”. Other words are extended than 4 letters, which include “summary”. Nearly all persons write the phrases on paper, but they can be kept in many other ways: remembered, written down around the margin of the reserve, https://atozbookmark.com/story18513063/bip39-add-private-key-little-known-facts-about-bip39-word-list