Bip39 First 4 Letters A BIP39 mnemonic sentence is often a set of words (most often twelve or 24) that we will connect with a lot more productively than other figures that are not words (bits and numbers and also the like). BIP39's reason in introducing the use of mnemonic https://tornadosocial.com/story4033152/bip39-bitcoin-core-bip39-can-be-fun-for-anyone