Build a phonebook dictionary

Summary

Create a dictionary from a list of name-number pairs. Handle duplicates by keeping the latest value.

Problem statement

Write a function build_phonebook(pairs) that takes an iterable (e.g., list or tuple) of 2-element tuples or lists. Each inner element contains a name (string) and a phone number (string or number). The function should return a dictionary mapping each name to its latest phone number. If a name appears multiple times, the value should reflect the last occurrence in the input. Maintain insertion order based on the first time a key appears (updating a value for an existing key should not change its position).

Task

Given an iterable of 2-tuples (name, number), return a dictionary mapping each name to its number.

Examples

Input format

A Python expression calling build_phonebook with an iterable of pairs, e.g. build_phonebook([('Name', 'Number')])

Output format

Return a dict mapping names to numbers. The test harness compares str(return_value).

Constraints

- pairs length can be 0..1000 - Names are hashable (typically strings) - Phone numbers can be strings or numbers - Do not print; return the dictionary

Samples