xg: ref(fl and c o*0.99,1) and c ref(o,1)
or ref(fl and c ref(c,1)*0.99 and c o,1) and c ref(c,1)
or ref(fl and c o*0.99,2) and c ref(o,2)
or ref(fl and c ref(c,1)*0.99 and c o,2) and c ref(c,2)
or ref(fl and c o*0.99,3) and c ref(o,3)
or ref(fl and c ref(c,1)*0.99 and c o,3) and c ref(c,3);