Bank Account Manager

You are required to implement a simple bank account management system. In this system, each account has a unique account number, an owner's name, and a balance. You must support the following operations:

• CREATE: Create an account with a given account number, owner name, and initial balance.
• DEPOSIT: Deposit an amount into a given account. The amount must be positive, i.e., \(amount > 0\). Otherwise, a ValueError should be reported.
• WITHDRAW: Withdraw an amount from a given account. The amount must be positive and the account balance must be sufficient. If \(amount \le 0\), report a ValueError; if the balance is insufficient, report an InsufficientFundsError.
• TRANSFER: Transfer an amount from one account to another. The transfer amount must be positive. If not, a ValueError is reported. The source account must have sufficient funds for the transfer.
• BALANCE: Print the current balance of a given account.

For operations that encounter errors (such as depositing a non-positive amount, withdrawing with insufficient funds, or negative transfers), print the corresponding error message (ValueError or InsufficientFundsError) and continue processing subsequent commands.

All formulas are given in LaTeX format, for example, the condition for a valid deposit is \(amount > 0\).

inputFormat

The first line of input contains an integer \(Q\) representing the number of commands. Each of the following \(Q\) lines contains one of the following commands:

• CREATE id owner initial_balance
• DEPOSIT id amount
• WITHDRAW id amount
• TRANSFER from_id to_id amount
• BALANCE id - print the current balance of the account with id.

Note that id is an integer and amount and initial_balance are floating point numbers. The owner is a single word string.

outputFormat

For each BALANCE command, print the current balance of the specified account on a separate line. For any operation that triggers an error (invalid deposit/withdraw/transfer amounts or insufficient funds), print the corresponding error message (ValueError or InsufficientFundsError) on a separate line.

## sample

7
CREATE 1 Alice 100.0
CREATE 2 Bob 50.0
DEPOSIT 1 50.0
WITHDRAW 2 10.0
TRANSFER 1 2 30.0
BALANCE 1
BALANCE 2

120.0
80.0

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