1/2 a^{c0}_{a0} b^{c3,a1}_{c1,c2} c^{a3,v1}_{a2,v0} eta1^{a2}_{a1} gamma1^{a0}_{a3} a+(c1) a+(c2) a+(v0) a-(v1) a-(c3) a-(c0)
+1/2 a^{c0}_{a0} b^{c3,a1}_{c1,c2} c^{a3,v1}_{a2,v0} lambda2^{a0,a2}_{a1,a3} a+(c1) a+(c2) a+(v0) a-(v1) a-(c3) a-(c0)