Many documents use a speMany documents use a specific format for a person's name. Write a program that reads a persor's name in the following format:

$[$optional firstName$][$zero or more middle names$]$ lastName $($in one line$)$

and outputs the person's name in the following format:

lastName, $[$name initials with dots between them$]$

Note that there should be no comma after the last name if the full name only had one part. This should work for a name with one or more

parts and assume that the last part is the last name.

Ex$.$ If the input is:

Pat Silly Doe

the output is:

Doe, P$.$S$.$

Ex$.$ If the input is:

Julia Clark

the output is:

Clark, J$.$

Ex: If the input is:

John Ronald Reuel Tolkien

the output is:

Tolkien, J$.$R$.$R$.$

Ex: If the input is:

Fletch

the output is:

Fletch

Ex: If the input is:

Albus Percival Wulfric Brian Dumbledore

the output is:

Dumbledore, A$.$P$.$W$.$B$.$