As I said above, it is true they are subsets, not substrings. For example, the single solution of AAAAEEEE is AAAA;EEEE, and EEEE;AAAA is identical to it, just written differently, so it should not count twice. Likewise the order within a subset: AAAA;GMST is identical to AAAA;TSGM and should count only once.

Duplicates occured when I used permutation. I give a minimal example. A permutation of AADE is AAED. But order does not matter. Therefore the permutation algorithm wasted time.

Typical set sizes range from 8 to 24 in steps of 4, but mostly longer than shorter.

The repertoire is limited to ADEFGMSTV.

I hope this helps your understanding.

In reply to Re^2: finding tuples by Anonymous Monk
in thread finding tuples by Anonymous Monk

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