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Hi, my name is Aulia. Please help me to guess what fruit that my friends bring today. 

• Kaila brings a long yellow fruit. Monkeys like to peel and eat that fruit.
• Karin brings a round fruit. It is usually green or red.
• Karen brings a sour and sweet fruit. Its name is the same as its color.
• Katty brings a yellow fruit. The fruit has a green "hat" on it. 

Karin brings a/an ....