The third grade is baked sweet potato; The fourth grade is a big sticky cake; Five years of experience is a big cat; Six years is a fire; The seventh level is mineral water; Eighth grade is a hungry giant; The ninth grade is Bigfoot.

The full text of a ballad (a jingle without a name sung when I was a child):

Little bean bags in the first grade jump by the dozen.

Pepper in the second grade, spicy bean curd.

Baked sweet potatoes on the third day are hot and dead peppers.

Big sticky cake in the fourth grade, sticky baked sweet potato.

The greedy cat in grade five ate a big sticky cake.

The fire in the sixth grade killed the greedy cat.

The seventh grade mineral water flooded the fire.

Thirsty giant in eighth grade, drinking mineral water.

Big feet in the ninth grade, stepping on thirsty giants

Extended data:

I used to hum a jingle when I was a child:

First, the tricycle runs fast, with an old lady sitting behind it.

Do you think it's strange to charge 50 cents a piece?

Secondly, on Sunday morning, the foggy old garbage collectors lined up.

I accidentally fell into the garbage and picked up a lot of broken shoes and pants.

The old garbage collector farted happily, and the king next door was watching the play.

Two soldiers were sent to investigate, not the atomic bomb.

It's not a machine gun, it's an old rag picker farting.

Third, when the sun comes out, I climb the pole, and when I climb the pole, I touch the wire.

Suddenly the high-voltage electricity came and sent me to the palace of hell.

I lit a cigarette for Yan, and Yan made me a big official.

After doing it year after year, I came back to this world.