Bip39 seed phrase checker https://giphy.com/channel/ebliciwsah Abra - A mobile wallet that supports BIP39 seed phrases, featuring equally wallet and exchange features for cryptocurrencies. For words that have only 3 letters, there is not any 4th letter. Such as While using the word “include”, there won't be any extra letters afterwards https://tetrabookmarks.com/story20685269/bip39-mnemonic-to-private-key-bip39-compatible-wallet-an-overview-https-linktr-ee-bip39