human
Solve in Python:
You're going on a trip with some students and it's up to you to keep track of how much money each Student has. A student is defined like this:

```python
class Student:
    def __init__(self, name, fives, tens, twenties):
        self.name = name
        self.fives = fives
        self.tens = tens
        self.twenties = twenties
```

As you can tell, each Student has some fives, tens, and twenties. Your job is to return the name of the student with the most money. If every student has the same amount, then return `"all"`.

Notes:
* Each student will have a unique name
* There will always be a clear winner: either one person has the most, or everyone has the same amount
* If there is only one student, then that student has the most money

=====
Write me a the Python code you requested?
assistant
#Here is the Python code you requested.

def cashmuny(student):
    return student.fives * 5 + student.tens * 10 + student.twenties * 20
def most_money(students):
    timdeo = students[0]
    all = False
    if len(students) == 1:
        return timdeo.name   
    for s in students[1:]:
        if cashmuny(s) > cashmuny(timdeo):
            timdeo = s
            all = False
        elif cashmuny(s) == cashmuny(timdeo):
            all = True
    if all == False:
        return timdeo.name
    if all == True:
        return "all"