phonebook = {
    'Alice': '703-493-1834',
    'Bob': '857-384-1234',
    'Elizabeth': '484-584-2923'
}
print(phonebook['Elizabeth'])

phonebook['Kareem'] = '938-489-1234'
print(phonebook['Kareem'])

print(phonebook)

phonebook['Bob'] = '968-345-2345'
print(phonebook)
