Potato, potato, I'm a sweet potato. What is the next code word?

Potato, potato, I'm a sweet potato. The next code word is sweet potato, I am potato and I am potato. Code word refers to the code word agreed by each other, which is used to express Song Yuwenbao's Four Records of Blowing Sword. It is also the judgment bureau that instructs the examiner to look for code words without looking at the text.

This should be just a code word or a joke between friends.

Code source

This is the transmitter code of the enemy spy in the anti-spy movie Soul of the Sea. The original words are sweet potato, I am potato, and the corresponding code names are Yangtze River, Yangtze River, and I am Yellow River.

This should be just a code word or a joke between friends. In specific cases, this kind of words is usually just a joke, and because potatoes and sweet potatoes are of the same kind, there is such a joke.