loosers = {}

def lib():
    key = input("введите юз: ").strip()
    interes = input("введите интересы через запятую: ")

    interes_list = [v.strip() for v in interes.split(",")]

    if key in loosers:
        loosers[key].extend(interes_list)
    else:
        loosers[key] = interes_list


while True:
    lib()
    print(loosers)

    stop = input("Продолжить? (да/нет): ").strip().lower()
    if stop == "нет":
        break

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