Please determine which QA question the question and answer belong to
The first type of simple QA: Based on the chart, the answer to the question does not require numerical estimation and falls exactly on the scale of the coordinate axis. When answering the question, the data can be directly read.
The second difficulty QA: According to the chart, the answer corresponding to the problem needs to be numerically estimated, and the value does not fall on the scale of the coordinate axis, but between the scale of the coordinate axis. When answering the question, it is necessary to analyze the value in the problem and estimate it based on the scale of the coordinate axis to provide an estimated answer.
Here are the QA questions and charts that need to be judged. Please answer directly what kind of QA question this QA question belongs to. If it belongs to the first type of simple QA question, return simple. If it belongs to the second type of difficult QA question, return difficult directly
Question:{question}
answer:{answer}

Please only return 'simple' or 'difficult' for the answer.