Ksi[1] = 0.070441621801729
Ksi[2] = 0.262891711531604
Ksi[3] = 0.737108288468396
Ksi[4] = 0.929558378198271
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Teta[1] = 0.070441621801729
Teta[2] = 0.262891711531604
Teta[3] = 0.737108288468396
Teta[4] = 0.929558378198271
