In my previous two posts, a question mark turned into an answer. As I mentioned, there are 5 to 20 possible starting points, and the answer is...

puzzle: 66 2832ed74 Possibilities : 10         puzzle: 67 730fc235 Possibilities : 13

   Seed : 1198740450 KHex : 2832ed74            Seed : 2113081982 KHex : 730fc235
   Seed : 1869248704 KHex : 2832ed74            Seed : 2179848786 KHex : 730fc235
   Seed : 3920977047 KHex : 2832ed74            Seed : 2620256395 KHex : 730fc235
   Seed : 4138865358 KHex : 2832ed74            Seed : 3559516538 KHex : 730fc235
   Seed : 5491054614 KHex : 2832ed74            Seed : 5559894373 KHex : 730fc235
   Seed : 5889540521 KHex : 2832ed74            Seed : 5960477113 KHex : 730fc235
   Seed : 6227837743 KHex : 2832ed74            Seed : 6204436682 KHex : 730fc235
   Seed : 7311367263 KHex : 2832ed74            Seed : 7016671995 KHex : 730fc235
   Seed : 7442940504 KHex : 2832ed74            Seed : 8305603871 KHex : 730fc235
   Seed : 8850149776 KHex : 2832ed74            Seed : 8560029709 KHex : 730fc235
                                                Seed : 8633074902 KHex : 730fc235
                                                Seed : 9737552820 KHex : 730fc235
                                                Seed : 9997208084 KHex : 730fc235

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Higher Probability of Success – Brute force requires exact matching, while this method increases chances by working with 5 to 20 potential seeds rather than the entire massive keyspace. still applies on Puzzle 68