Don't know how to work Stroustrup's code example named PHONE_BOOK

Hi
This file runs ok
one 1}
{two 2}
{three 3}
{four 4}
{five 5}
{six 6}
{six 6}
{two 2}
{three 3}
{four 4}
{five 5}
{six 6}
four 4
three 3
But now I dont know how shall I enter names and numbers. May be another file is missing. May I (beginner) have some help. Thanks a lot

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