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Thank you,

I got it right now in like 1 minute after your hint. So easy to look past some detail, in this case I had mistaken the limit to be 20 sequences, when it was actually n depending on the dimension of the input table. and counted one step too many as you hinted about.

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MAIN PLEDGE FOR PEOPLE NOT WANTING TO READ WHOLE POST:
Please give me more sample input this problem is killing me ...