Add singular and plural forms of bullfrog to the following sentence: "The bullfrogs and the ___ hopped quickly away."
The bullfrogs and the bullfrog hopped quickly away.
Complete the following task based on the instruction and optional input provided.### Instruction:
Add singular and plural forms of bullfrog to the following sentence: "The bullfrogs and the ___ hopped quickly away."

### Output:
The bullfrogs and the bullfrog hopped quickly away.