An 18-word mnemonic phrase will increase safety by adding extra words for the sequence. Right here’s an instance: Standard recovery phrases use a specific list of 2048 words adhering to the BIP39 standard (Bitcoin Enhancement Proposal 39). You could verify if your words are A part of the BIP39 list https://bookmarkinglive.com/story19593544/a-secret-weapon-for-bip39-words-to-numbers