You can change one word into another of the same length by a series of steps whereby at each step you change one of the letters and rearrange to form a valid word. This differs from usual word ladders where you aren’t permitted to rearrange the letters.

LEAD and GOLD both contain L and D so would only require two steps to change between them, so just one intermediate word, for instance: LEAD – GLAD – GOLD.

Can you change CARBON into SILVER in only five steps (four intermediate words)?