Find and classify the type of errors in the text.
The birds flyed up in the air.
The sentence contains a grammatical error.

In the sentence, the verb "flyed" is incorrect. The correct past tense form of the verb "fly" is "flew." The sentence should read: "The birds flew up in the air."
Complete the following task based on the instruction and optional input provided.### Instruction:
Find and classify the type of errors in the text.

### Input:
The birds flyed up in the air.

### Output:
The sentence contains a grammatical error.

In the sentence, the verb "flyed" is incorrect. The correct past tense form of the verb "fly" is "flew." The sentence should read: "The birds flew up in the air."