<s>[INST] Here is an example of a "Word Ladder" puzzle:
```
Start  with:  FISH
Change the F to a B to get:  BISH
Change  the  B  to  an  M  to  get:  MISH
Change  the  M  to  an  F  to  get:  FISH
```
You start with a word, change one letter in the word to get a new word, and change one letter again to get another new word, and so on.  The goal is to get from one word to another word by changing one letter at a time, and each resulting word has to be a valid word.  Can you solve this puzzle by getting from "BEAD" to "code" with 4 intermediate words?[/INST]