I have a problem with the crane and the operators, I have 2 cranes, 3 operators, 3 combiners and 6 buffers, in which the operators need to transport the materials from the buffers to the combiners, having as restriction that each operator need to transport the materials with crane to any combiner available but I have not been able to solve that requirement, I would like help. (Name of combiners: Puntep1, Punteo2, Punteo3; Operators name: Op P1, Op P2, Op P3; All buffers; Cranes name: Grua0 and Grua1)