def ll_insert(head, name, phone): #Oбновление записи в связном списке
    if head is None:
        return {'name': name, 'phone': phone, 'next': None}
    current = head
    while current is not None:
        if current['name'] == name:
            current['phone'] = phone
            return head
        current = current['next']
    new_node = {'name': name, 'phone': phone, 'next': None}
    current = head
    while current['next'] is not None:
        current = current['next']
    current['next'] = new_node
    return head


def ll_find(head, name): #Поиск телефона по имени
    current = head
    while current is not None:
        if current['name'] == name:
            return current['phone']
        current = current['next']
    return None


def ll_delete(head, name): #Удаление записи по имени
    if head is None:
        return None
    
    if head['name'] == name:
        return head['next']
    
    current = head
    while current['next'] is not None:
        if current['next']['name'] == name:
            current['next'] = current['next']['next']
            return head
        current = current['next']
    return head


def ll_list_all(head): #Сбор всех записей и сортировка по имени
    records = []
    current = head
    while current is not None:
        records.append((current['name'], current['phone']))
        current = current['next']
    records.sort(key=lambda x: x[0])
    return records