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