In your class, you have started lessons about geometric progression.
Since you are also a programmer, you have decided to write a function that will print first `n` elements of the sequence with the given constant `r` and first element `a`.
Result should be separated by comma and space.
### Example
```python
geometric_sequence_elements(2, 3, 5) == '2, 6, 18, 54, 162'
```
More info: https://en.wikipedia.org/wiki/Geometric_progression
def geometric_sequence_elements(a, r, n):
    l = []
    for _ in range(n):
        l.append(str(a))
        a *= r
    return ", ".join(l)

def geometric_sequence_elements(a, r, n):
    l = []
    for _ in range(n):
        l.append(str(a))
        a *= r
    return ", ".join(l)
