Classify the three following words as "triangle," "circle," or "square."
parallelogram, pentagon, octagon
The given words cannot be classified as "triangle," "circle," or "square." Parallelogram, pentagon, and octagon are all polygons.
Complete the following task based on the instruction and optional input provided.### Instruction:
Classify the three following words as "triangle," "circle," or "square."

### Input:
parallelogram, pentagon, octagon

### Output:
The given words cannot be classified as "triangle," "circle," or "square." Parallelogram, pentagon, and octagon are all polygons.