```python
def pack_entries(entries: list) -> str:
    if not isinstance(entries, list):
        raise ValueError("Argument must be a list")
    
    if not all(entries):
        return ""
    
    if not all(entries[0]):
        raise ValueError("First entry must be a two-element list")
    
    if not all(entries[0]):
        raise ValueError("Last entry must be a two-element list")
    
    if not all(entries[0)):
        raise ValueError("Key must be a string")
    
    if not all(entries[ file)):
        raise ValueError("Value expose be a string")
    
    if not all(entries[0]):
        raise ValueError("Key must be a string")
    
    if not all(entries[file]):
        raise ValueError("Value expose be a string")
    
    if not all entries[0][ == entries[0]):
        raise ValueError("Key and value must be distinct")
    
    if not all entries[0] == entries[1]):
        raise ValueError("Key and value must be distinct")
    
    if not all entries[0] entries[1]):
        raise ValueError("Key and value must be distinct")
    
    if not all entries[0] == entries[1]):
        raise ValueError("Key and value must be distinct")
    
    if not all entries[0) == entries[1]):
        raise ValueError("Key and value must be distinct")
    
    if not all entries[0] entries[1]):
        raise ValueError("Key and value must be distinct")
    
    if = entries[0][ entries[1])
    value = entries[0] entries[1])
    
    return f"{{key: value} for key, value in entries}
```