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

SIZE = 5

def hash_func(name):
    s = 0
    for ch in name:
        s += ord(ch)
    return s % SIZE

def ht_insert(buckets, name, phone):
    idx = hash_func(name)
    buckets[idx] = ll_insert(buckets[idx], name, phone)
    return buckets

def ht_find(buckets, name):
    idx = hash_func(name)
    return ll_find(buckets[idx], name)

def ht_delete(buckets, name):
    idx = hash_func(name)
    buckets[idx] = ll_delete(buckets[idx], name)
    return buckets

def ht_list_all(buckets):
    all_rec = []
    for head in buckets:
        cur = head
        while cur:
            all_rec.append((cur['name'], cur['phone']))
            cur = cur['next']
    all_rec.sort(key=lambda x: x[0])
    return all_rec

if __name__ == '__main__':
    buckets = [None] * SIZE
    ht_insert(buckets, '1', '123-456')
    ht_insert(buckets, '2', '789-012')
    ht_insert(buckets, '3', '345-678')
    ht_insert(buckets, '4', '111-222')
    print("HT all:", ht_list_all(buckets))
    print("HT find 1:", ht_find(buckets, '1'))
    ht_delete(buckets, '2')
    print("HT after delete 2:", ht_list_all(buckets))