r= x^20 + x^19 - x^17 - x^16 + x^14 + x^13 - x^11 - x^10 - x^9 + x^7 + x^6 - x^4 - x^3 + x + 1 q= x^28 - 2*x^25 + x^22 - x^17 + 2*x^14 - x^11 + x^6 + x^3 + 1 P= 3*q_k22method66 v= x