Class 1: pAAA, pCCC, pGGG, pTTT
Class 2: pAAC, pAAT, pCCA, pCCG, pGGC, pGGT, pTTA, pTTG
Class 3: pAAG, pCCT, pGGA, pTTC
Class 4: pACA, pATA, pCAC, pCGC, pGCG, pGTG, pTAT, pTGT
Class 5: pACC, pATT, pCAA, pCGG, pGCC, pGTT, pTAA, pTGG
Class 6: pACG, pATG, pCAT, pCGT, pGCA, pGTA, pTAC, pTGC
Class 7: pACT, pATC, pCAG, pCGA, pGCT, pGTC, pTAG, pTGA
Class 8: pAGA, pCTC, pGAG, pTCT
Class 9: pAGC, pAGT, pCTA, pCTG, pGAC, pGAT, pTCA, pTCG
Class 10: pAGG, pCTT, pGAA, pTCC