
Please apply the following process until the same results is obtained to solve "sum of odd number between 2 and 7".
1. Propose 2 different solutions.
2.Based on the 2 solutions, solve problem A and obtain 2 results.
3. If the 2 results are the same, return the results and exit, else think step by step why the results are different.
4. Based on the reason, propose 2 improved solutions.
5. Go to 2. I want the entire output in JSON format.
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