Bip39 github https://go.bubbl.us/ebe220/f17a?/Bookmarks A BIP39 seed phrase developed with suitable randomness can not be guessed via brute force, simply because there are just too lots of permutations. If A further wallet won't help a derivation route that the initial wallet supported, that doesn't suggest your coins are lost. It basically https://www.slideserve.com/lewarthbfp/getting-a-bip39-phrase-in-python-a-comprehensive-tutorial