#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Mon Nov  7 21:55:23 2022

@author: leprince
"""

dico = {'Bob': 657 , 'Alice': 786 , 'Charlie': 687}

dico['Bob'] = 667

print(dico['Bob'])

print('Bob' in dico)

for a in dico:
    print(a)

print(len(dico))