def ll_insert(head, name, phone):
    current = head
    while current is not None:
        if current['name'] == name:
            current['phone'] = phone 
            return head
        current = current['next']
    return {'name': name, 'phone': phone, 'next': head}
# проверка
# my_list = None
# my_list = ll_insert(my_list, "Ivan", "555")
# my_list = ll_insert(my_list, "An", "666")
# print(my_list)

def ll_find(head, name):
    current = head
    while current is not None:
        if current['name'] == name:
            return current['phone']
        current = current['next']
    return None
# print(ll_find(my_list,"An"))
# buskets = [None]*10
# print(buskets)

def ll_delete(head, name):
    if head is None:
        return None
    current = head
    if head['name'] == name:
        return head['next']
    while current['next'] is not None:
        if current['next']['name'] == name:
            current['next'] = current['next']['next']
            break
        current = current['next']
    return head
    
def ll_list_all(head):
    res = []
    current = head
    while current is not None:
        res.append((current['name'], current['phone']))
        current = current['next']
    res.sort()
    return res