Insert a comma in this sentence: It was raining heavily the streets were slick
It was raining heavily the streets were slick
It was raining heavily, the streets were slick.
Complete the following task based on the instruction and optional input provided.### Instruction:
Insert a comma in this sentence: It was raining heavily the streets were slick

### Input:
It was raining heavily the streets were slick

### Output:
It was raining heavily, the streets were slick.