Bip39 Browser. The sole purpose those letters are listed is to really make it a lot easier for our human brains to read through them And maybe memorize our recovery phrase. The BIP39 standard was produced to really make it less complicated for users to Get well their wallets in https://stephenrixma.wikilima.com/988337/the_anatomy_of_a_bip39_phrase_entropy_terms_and_security