Complete the solution so that it takes the object (JavaScript/CoffeeScript) or hash (ruby) passed in and generates a human readable string from its key/value pairs. 
The format should be "KEY = VALUE". Each key/value pair should be separated by a comma except for the last pair.
**Example:**
```python
solution({"a": 1, "b": '2'}) # should return "a = 1,b = 2"
```
def solution(pairs):
    answer = [str(i) + ' = ' + str(pairs[i]) for i in pairs]
    answer.sort()
    return ','.join(answer)
def solution(pairs):
    answer = [str(i) + ' = ' + str(pairs[i]) for i in pairs]
    answer.sort()
    return ','.join(answer)