Select the word that does not belong in the list.
blue, pink, green, yellow
All the words in the list belong to the category of colors. There is no word that does not belong in the list.
Complete the following task based on the instruction and optional input provided.### Instruction:
Select the word that does not belong in the list.

### Input:
blue, pink, green, yellow

### Output:
All the words in the list belong to the category of colors. There is no word that does not belong in the list.