prueba listArgs = ((pos_f filtered_pre output), (listArgs), (filtered_pre))
              where 
                     filtered_pre = pre_f listArgs
                     output = fun_f filtered_pre
prueba listArgs = ((pos_f filtered_pre output), (listArgs), (filtered_pre))
              where 
                     filtered_pre = pre_f listArgs
                     output = fun_f filtered_pre
prueba listArgs = ((pos_f filtered_pre output), (listArgs), (filtered_pre))
              where 
                     filtered_pre = pre_f listArgs
                     output = fun_f filtered_pre