1/2 a^{c0}_{a0} b^{c1}_{a1} c^{a2,a3}_{v0,v1} gamma1^{a1}_{a3} gamma1^{a0}_{a2} a+(v0) a+(v1) a-(c1) a-(c0)
+1/4 a^{c0}_{a0} b^{c1}_{a1} c^{a2,a3}_{v0,v1} lambda2^{a0,a1}_{a2,a3} a+(v0) a+(v1) a-(c1) a-(c0)