User Subscription Management System

In this problem, you are required to implement a simple user subscription management system. The system supports two operations:

1. update: Update the subscription status of a user based on the provided payment status.
   Payment status mapping is as follows:
   ( \texttt{paid} \rightarrow \texttt{active} ), ( \texttt{failed} \rightarrow \texttt{inactive} ), and ( \texttt{pending} \rightarrow \texttt{pending} ).
   If the input for the update operation is invalid (e.g. empty user ID or an invalid payment status), the update should not be performed.

2. fetch: Retrieve the current subscription status of a user. If the user ID is invalid (i.e. empty) or never updated, the output should be error.

You must read the input from stdin and write the output to stdout.

inputFormat

The input begins with an integer T ((1 \leq T \leq 10^5)) which denotes the number of operations. Each of the following T lines represents an operation and can be one of the following two types:

1. update userId paymentStatus
   - userId: a non-empty string.
   - paymentStatus: one of paid, failed, or pending.

2. fetch userId
   - userId: a non-empty string. If missing or empty, it is considered invalid.

For update operations, no output is produced. For fetch operations, output the user's subscription status on a new line.

outputFormat

For each fetch operation, output the user's subscription status. The status will be one of active, inactive, pending if the user has been updated successfully. Otherwise, output error if the userId is invalid or was never updated.## sample

6
update 12345 paid
fetch 12345
update 12346 failed
fetch 12346
update 12347 pending
fetch 12347

active
inactive
pending