Custom Exception: Exception class for Business Logic

In this problem, you will create a program that implements an InsufficientFundsException custom exception class, processes a bank account withdrawal for a specified amount, and displays the result to standard output.

Learning Objective: Create custom exception class for business-appropriate exception handling

Create InsufficientFundsException to represent bank account insufficient funds. When the balance is sufficient, perform the withdrawal; when it is not, throw the custom exception with a message containing the required amount and the available balance.

Input

Line 1: Initial balance
Line 2: Withdrawal amount

Output

Success: Withdrawn: [amount], Balance: [balance]
Insufficient: Insufficient funds: required [needed], available [balance]

Example

Input:

1000
500

Output:

Withdrawn: 500, Balance: 500