import random as rnd


def ll_insert(head, name, phone):
    new_node = {'name': name, 'phone': phone, 'next': None}
    
    if head is None:
        return new_node
    
    
    current = head
    while current is not None:
        if current['name'] == name:
            current['phone'] = phone
            return head
        if current['next'] is None:
            break
        current = current['next']
        
    current['next'] = new_node
    return head

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


def ll_delete(head, name):
    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 sort_records(lst):
    n = len(lst)
    for i in range(n):
        for j in range(0, n-i-1):
            if lst[j][0] > lst[j + 1][0]:
                lst[j], lst[j + 1] = lst[j + 1], lst[j]
    return lst


def ll_list_all(head):
    record = []
    current = head
    while current is not None:
        record += [(current['name'], current['phone'])]
        current = current['next']
    res = sort_records(record)
    return res






def def_hash(name, size):
    hash_value = 0
    for char in name:
        hash_value += ord(char)
    final_idx = hash_value % size
    return final_idx


def ht_insert(buckets, name, phone):
    size = len(buckets)
    idx = def_hash(name, size)
    ll_insert(buckets[idx], name, phone)


def ht_find(buckets, name):
    size = len(buckets)
    idx = def_hash(name, size)
    return ll_find(buckets[idx], name)



def ht_delete(buckets, name):
    size = len(buckets)
    idx = def_hash(name, size)
    buckets[idx] = ll_delete(buckets[idx], name)


def ht_list_all(buckets):
    res = []
    for head in buckets:
        current = head
        while current is not None:
            res += [(current['name'], current['phone'])]
            current = current['next']
    return sort_records(res)