RK-A2

Update the parsing logic of detailed solution in the Colab to handle the following variations/issues:
Ref: https://teams.microsoft.com/l/message/19:[email protected]/1743497071502?tenantId=004a3e40-29ae-4f76-934f-44d6f253b5be&groupId=a0742afc-5585-411a-b096-19e5388f6863&parentMessageId=1743407837642&teamName=RK-A&channelName=General&createdTime=1743497071502

1. Strip "#$%" for cases where we have "#$%<unknown pattern>". So, if you find '#$%<known key><something1>#$%Conclusion: <something2>', the value for <known key> should be '<something1>Conclusion: <something2>' instead of '<something1>'.
2. Sometime the key for sub steps will be provided as ' Substep x.y '
3. Remove the occurrences of ' Substeps for step x: ' from main step.