A:=[
[`CeremBurial`, `Nil`],
[`Code Law`, `Alphabet`],
[`Mysticism`, `CeremBurial`],
[`Polytheism`, `CeremBurial`, `Horse`],
[`Monarchy`, `CeremBurial`, `Code Law`],
[`Republic`, `Code Law`, `Literacy`],
[`Philos`, `Mysticism`, `Literacy`],
[`Monotheism`, `Philos`, `Polytheism`],
[`Theology`, `Monotheism`, `Feudalism`],
[`Fundamentalism`, `Monotheism`, `Conscrip`],
[`Communism`, `Philos`, `Industrial`],
[`Democracy`, `Banking`, `Invention`],
[`Labor Unions`, `MassProd`, `Guerilla`],
[`Recycling`, `MassProd`, `Democracy`],
[`Enviromentalism`, `Recycling`, `Space Fl`],
[`Alphabet`, `Nil`],
[`Writing`, `Alphabet`],
[`Literacy`, `Writing`, `Code Law`],
[`Math`, `Alphabet`, `Masonry`],
[`University`, `Philos`, `Math`],
[`Astronomy`, `Mysticism`, `Math`],
[`Physics`, `Navigation`, `Literacy`],
[`Chemistry`, `University`, `Medicine`],
[`Magnetism`, `Physics`, `Ironwork`],
[`Gravity`, `Astronomy`, `University`],
[`Steam Engine`, `Physics`, `Invention`],
[`Atomic Thy`, `Physics`, `Gravity`],
[`Nuc Fission`, `Atomic Thy`, `MassProd`],
[`Nuc Power`, `Nuc Fission`, `Electron`],
[`Laser`, `Nuc Power`, `MassProd`],
[`Space Fl`, `Comput`, `Rocketry`],
[`Supercond`, `Laser`, `Plastics`],
[`Genetic Engg`, `Medicine`, `Corporat`],
[`Fusion Power`, `Supercond`, `Nuc Power`],
[`Future Tech`, `Fusion Power`, `Recycling`],
[`Masonry`, `Nil`],
[`Bronze Work`, `Nil`],
[`Wheel`, `Horse`],
[`Ironwork`, `Bronze Work`, `Warrior Code`],
[`Construction`, `Masonry`, `Currency`],
[`Engineering`, `Construction`, `Wheel`],
[`BridgeBldg`, `Construction`, `Ironwork`],
[`Explosives`, `Gunpowder`, `Chemistry`],
[`Refining`, `Chemistry`, `Corporat`],
[`Combustion`, `Refining`, `Explosives`],
[`Electricity`, `Magnetism`, `Metallurgy`],
[`Steel`, `Electricity`, `Industrial`],
[`Machine To`, `Steel`, `Tactics`],
[`Flight`, `Combustion`, `Gravity`],
[`Invention`, `Engineering`, `Literacy`],
[`Automobile`, `Combustion`, `Steel`],
[`Radio`, `Flight`, `Electricity`],
[`Adv Flight`, `Radio`, `Machine To`],
[`MassProd`, `Automobile`, `Corporat`],
[`Plastics`, `Refining`, `Space Fl`],
[`Miniaturization`, `Electron`, `Machine To`],
[`Electron`, `Electricity`, `Corporat`],
[`Comput`, `Miniaturization`, `MassProd`],
[`Pottery`, `Nil`],
[`MapMaking`, `Alphabet`],
[`Seafaring`, `MapMaking`, `Pottery`],
[`Currency`, `Bronze Work`],
[`Trade`, `Currency`, `Code Law`],
[`Navigation`, `Seafaring`, `Astronomy`],
[`Banking`, `Trade`, `Republic`],
[`Medicine`, `Trade`, `Philos`],
[`Economics`, `Banking`, `University`],
[`Railroads`, `Steam Engine`, `BridgeBldg`],
[`Industrial`, `Banking`, `Railroads`],
[`Corporat`, `Economics`, `Industrial`],
[`Sanitation`, `Medicine`, `Engineering`],
[`Refrigeration`, `Electricity`, `Sanitation`],
[`Warrior Code`, `Nil`],
[`Horse`, `Nil`],
[`Feudalism`, `Warrior Code`, `Monarchy`],
[`Gunpowder`, `Invention`, `Ironwork`],
[`Chivalry`, `Feudalism`, `Horse`],
[`Leadersh`, `Gunpowder`, `Chivalry`],
[`Metallurgy`, `Gunpowder`, `University`],
[`Conscrip`, `Metallurgy`, `Democracy`],
[`Tactics`, `Conscrip`, `Leadersh`],
[`Espionage`, `Communism`, `Democracy`],
[`Guerilla`, `Tactics`, `Communism`],
[`Amphibious Warfare`, `Tactics`, `Navigation`],
[`Mobile Warf`, `Tactics`, `Automobile`],
[`Combined Arms`, `Mobile Warf`, `Adv Flight`],
[`Rocketry`, `Adv Flight`, `Electron`],
[`Robotics`, `Mobile Warf`, `Comput`],
[`Stealth`, `Robotics`, `Supercond`]]: