------
## 最终结论
```python
def Find_Min(lists):
    min_sublist = lists[0]
    for sublist in lists:
        if len(sublist) < len(min_sublist):
            min_sublist = sublist
    return min_sublist

# Test cases
assert Find_Min([[1],[1,2],[1,2,3]]) == [1]
assert Find_Min([[1,1],[1,1,1],[1,2,7,8]]) == [1,1]
assert Find_Min([['x'],['x','y'],['x','y','z']]) == ['x']
```