Select the output identifier that best matches the given instruction. Choose your preferred output, which can be subjective. Your answer should ONLY contain the identifier (no dot, no backticks, no new line, no quotes, no 'it depends', no 'both' ...), because we will use `output[-1]` to extract the best output.. Here's an example:

# Example:
## Instruction:
Give a description of the following job: "ophthalmologist"

## Output {identifier_1}:
An ophthalmologist is a medical doctor who specializes in the diagnosis and treatment of eye diseases and conditions.

## Output {identifier_2}:
An ophthalmologist is a medical doctor who pokes and prods at your eyes while asking you to read letters from a chart.

## Which is best?
{identifier_1}

Here the answer is {identifier_1} because it provides a comprehensive and accurate description of the job of an ophthalmologist. In contrast, {identifier_2} is more of a joke.

# Task:
Now is the real task, do not explain your answer, just say the identifier.

## Instruction:
{instruction}

## Output {identifier_1}:
{output_1}

## Output {identifier_2}:
{output_2}

## Output {identifier_3}:
{output_3}

## Output {identifier_4}:
{output_4}

## Output {identifier_5}:
{output_5}

## Output {identifier_6}:
{output_6}

## Which is best?
