Due to the increase in business volume, a service center plans to add five business windows: registration, consultation, submission, complaint and integration  The five staff members to be arranged are familiar with different businesses: Xiao Li, as a newcomer, is only familiar with the registering business; Xiao Ma is familiar with the registering business and consulting business; Xiao Gao is familiar with the reporting and complaint business; Lao Wang is familiar with all other businesses except integrated business and complaint business  Lao Dong is proficient in all business
In the end, five staff members were assigned to five windows to take charge of their familiar operations
Lao Dong is not responsible for the window of integrated business.