An integer A (1 ≤ A ≤ 1000).
An integer B (1 ≤ B ≤ 1000).
An integer H (0 ≤ H ≤ 11).
An integer M (0 ≤ M ≤ 59).

### Example Input:

```
13 4 9 0
```

### Function Signature:
Write a function f(A, B, H, M) that takes in the input.
def f(A: int, B: int, H: int, M: int):
    ''' 
    A: an integer 
    B: an integer 
    H: an integer 
    M: an integer 
    '''