Class 1: pAAAA, pCCCC, pGGGG, pTTTT
Class 2: pAAAC, pAACA, pACAA, pCACC, pCCAC, pCCCA, pGGGT, pGGTG, pGTGG, pTGTT, pTTGT, pTTTG
Class 3: pAAAG, pAAGA, pAGAA, pCCCT, pCCTC, pCTCC, pGAGG, pGGAG, pGGGA, pTCTT, pTTCT, pTTTC
Class 4: pAAAT, pAATA, pATAA, pCCCG, pCCGC, pCGCC, pGCGG, pGGCG, pGGGC, pTATT, pTTAT, pTTTA
Class 5: pAACC, pACAC, pACCA, pCAAC, pCACA, pCCAA, pGGTT, pGTGT, pGTTG, pTGGT, pTGTG, pTTGG
Class 6: pAACG, pAAGC, pACAG, pACGA, pAGAC, pAGCA, pCACT, pCATC, pCCAT, pCCTA, pCTAC, pCTCA, pGAGT, pGATG, pGGAT, pGGTA, pGTAG, pGTGA, pTCGT, pTCTG, pTGCT, pTGTC, pTTCG, pTTGC
Class 7: pAACT, pAATC, pACAT, pACTA, pATAC, pATCA, pCACG, pCAGC, pCCAG, pCCGA, pCGAC, pCGCA, pGCGT, pGCTG, pGGCT, pGGTC, pGTCG, pGTGC, pTAGT, pTATG, pTGAT, pTGTA, pTTAG, pTTGA
Class 8: pAAGG, pAGAG, pAGGA, pCCTT, pCTCT, pCTTC, pGAAG, pGAGA, pGGAA, pTCCT, pTCTC, pTTCC
Class 9: pAAGT, pAATG, pAGAT, pAGTA, pATAG, pATGA, pCCGT, pCCTG, pCGCT, pCGTC, pCTCG, pCTGC, pGACG, pGAGC, pGCAG, pGCGA, pGGAC, pGGCA, pTACT, pTATC, pTCAT, pTCTA, pTTAC, pTTCA
Class 10: pAATT, pATAT, pATTA, pCCGG, pCGCG, pCGGC, pGCCG, pGCGC, pGGCC, pTAAT, pTATA, pTTAA
Class 11: pACCC, pCAAA, pGTTT, pTGGG
Class 12: pACCG, pACGC, pAGCC, pCAAT, pCATA, pCTAA, pGATT, pGTAT, pGTTA, pTCGG, pTGCG, pTGGC
Class 13: pACCT, pACTC, pATCC, pCAAG, pCAGA, pCGAA, pGCTT, pGTCT, pGTTC, pTAGG, pTGAG, pTGGA
Class 14: pACGG, pAGCG, pAGGC, pCATT, pCTAT, pCTTA, pGAAT, pGATA, pGTAA, pTCCG, pTCGC, pTGCC
Class 15: pACGT, pACTG, pAGCT, pAGTC, pATCG, pATGC, pCAGT, pCATG, pCGAT, pCGTA, pCTAG, pCTGA, pGACT, pGATC, pGCAT, pGCTA, pGTAC, pGTCA, pTACG, pTAGC, pTCAG, pTCGA, pTGAC, pTGCA
Class 16: pACTT, pATCT, pATTC, pCAGG, pCGAG, pCGGA, pGCCT, pGCTC, pGTCC, pTAAG, pTAGA, pTGAA
Class 17: pAGGG, pCTTT, pGAAA, pTCCC
Class 18: pAGGT, pAGTG, pATGG, pCGTT, pCTGT, pCTTG, pGAAC, pGACA, pGCAA, pTACC, pTCAC, pTCCA
Class 19: pAGTT, pATGT, pATTG, pCGGT, pCGTG, pCTGG, pGACC, pGCAC, pGCCA, pTAAC, pTACA, pTCAA
Class 20: pATTT, pCGGG, pGCCC, pTAAA