class User:
    def __init__(self, name, balance, checking_account):
        self.name = name
        self.balance = balance
        self.checking_account = checking_account
        
    def withdraw(self, amount):
        if amount > self.balance:
            raise ValueError("Not enough money")
        
        self.balance -= amount
        return f"{self.name} has {self.balance}."
        
    def add_cash(self, amount):
        self.balance += amount
        return f"{self.name} has {self.balance}."
        
    def check(self, other_user, amount):
        if not other_user.checking_account:
            raise ValueError("User has no checking account")
            
        if other_user.balance < amount:
            raise ValueError("Not enough money")
            
        other_user.balance -= amount
        self.balance += amount
        
        return f"{self.name} has {self.balance} and {other_user.name} has {other_user.balance}."