//(p^3 + p^2 + p + 1)/4 algebras
<a,b,c|ca-bab,cb-wbaa,pa-bab-ybaaa,pb,pc-xbaaa,class=4>(x ne 0, all y, x~-x, y~-y)
<a,b,c|ca-bab,cb-wbaa,pa-bab,pb-ybaaa,pc,class=4>(all y, y~-y)
<a,b,c|ca-bab,cb-wbaa,pa-zbaa-bab-ybaaa,pb,pc-xbaaa,class=4>(x,z ne 0, all y, y~-y, z~-z)
<a,b,c|ca-bab,cb-wbaa,pa-zbaa-bab,pb-ybaaa,pc,class=4>(all y, z ne 0, y~-y, z~-z)
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