import csv

def display_manager_solution(csv_data):
    employees = []
    managers = {}
    current_id = 1

    reader = csv.DictReader(csv_data.splitlines())

    for row in reader:
        manager_full_name = row['Manager']
        if manager_full_name and manager_full_name not in managers:
            managers[manager_full_name] = str(current_id)
            current_id += 1

        # Assign an ID to the employee (who is not already a manager)
        employee_full_name = f"{row['FirstName']} {row['LastName']}"
        if employee_full_name not in managers:
            managers[employee_full_name] = str(current_id)
            current_id += 1

        manager_id = managers.get(manager_full_name, '')

        employees.append((managers[employee_full_name], manager_id, row['LastName'], row['FirstName']))

    employees.sort(key=lambda x: x[0])

    for employee in employees:
        print(','.join(employee))


def main():
    csv_data = []
    with open('employees.csv') as f:
        csvreader = csv.reader(f)
        csv_data = list(csvreader)
        # Display the manager solution
        display_manager_solution(csv_data)