I want the logical way to do it. I am curious of the naive wayalso if that’s simpler
The txt file is copied andpasted below.
There are 43 rows. The first one starts at 1 and ends at 64. Thesecond starts at 0 and ends at 63 . The third one starts at -1 andends at 62. The last row starts at -41 and ends at 22. You can seethe patterns here. You can reproduce that
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