`ethereum import-hd` fails with valid mnemonic
```
$ ./target/release/wagyu ethereum import-hd --mnemonic "candy maple cake sugar pudding cream honey rich smooth crumble sweet treat" --derivation "m/44'/60'/0'/0/0/"
Error: MnemonicError(WordlistError(InvalidWord("candy")))
```

Not sure why this is not working, this is clearly a valid mnemonic.