It's a joke. Say green, pink, and yellow in one sentence. Some kid in my math class ended up with THAT sentence. Fake accent made me laugh so hard.
ah o3o
Now make up a sentence with the words, green, yellow and pink, if you would please.... 
A pink cat with yellow eyes vomitted up a green rat 
...Thank you for killing my appetite. T_T
you're welcome 8D