Company Users

dictionary = {}

while True:
    line = input()
    if line == "End":
        break

    line_split = line.split(" -> ")
    company_name = line_split[0]
    employee_id = line_split[1]

    if company_name not in dictionary:
        dictionary[company_name] = [] # списък от id-тата на дадената компания

    if employee_id not in dictionary[company_name]: # само ако даденото id го няма от списъка го добавяме
        dictionary[company_name].append(employee_id)


for company, employee_id in dictionary.items():
    print(company)
    for employee in employee_id:
        print(f"-- {employee}")