def ll_insert(head, name, phone):
    cur = head
    while cur:
        if cur['name'] == name:
            cur['phone'] = phone
            return head
        cur = cur['next']
    new_node = {'name': name, 'phone': phone, 'next': None}
    if head is None:
        return new_node
    cur = head
    while cur['next']:
        cur = cur['next']
    cur['next'] = new_node
    return head

def ll_find(head, name):
    cur = head
    while cur:
        if cur['name'] == name:
            return cur['phone']
        cur = cur['next']
    return None

def ll_delete(head, name):
    if head is None:
        return None
    if head['name'] == name:
        return head['next']
    prev = head
    cur = head['next']
    while cur:
        if cur['name'] == name:
            prev['next'] = cur['next']
            return head
        prev = cur
        cur = cur['next']
    return head

def ll_list_all(head):
    res = []
    cur = head
    while cur:
        res.append((cur['name'], cur['phone']))
        cur = cur['next']
    res.sort(key=lambda x: x[0])
    return res


if __name__ == '__main__':
    head = None
    head = ll_insert(head, 'Pasha', '123-456')
    head = ll_insert(head, 'Andrey', '789-012')
    head = ll_insert(head, 'Alisa', '345-678')
    head = ll_insert(head, 'Anna', '111-222')
    print("All:", ll_list_all(head))
    print("Find Pasha:", ll_find(head, 'Pasha'))
    head = ll_delete(head, 'Andrey')
    print("After delete Andrey:", ll_list_all(head))