theorem Th76: :: GFACIRC1:76
for x, y, z being set st x <> [<*y,z*>,and2c] & y <> [<*z,x*>,nor2] & z <> [<*x,y*>,and2a] holds
InputVertices (GFA2CarryIStr (x,y,z)) = {x,y,z}