How do you change bear to goat Changing one letter at a time?

To change "bear" to "goat" by altering one letter at a time, you can follow this sequence:

1. bear
2. gear (change 'b' to 'g')
3. get (change 'a' to 't')
4. goat (change 'e' to 'o')

Each step changes only one letter, and the intermediate Words are valid.