$2\mathrm{.}12$ LAB: Name format

Many documents use a specific format for a persor's name. Write a program that reads a person

firstName middleName lastName $($in one line$)$

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

lastName, firstinitial.middlelnitial.

Ex: If the input is:

Pat Silly Doe

the output is:

Doe, P$.$S$.$

If the input has the following format:

first Name lastName $($in one line$)$

the output is:

lastName, firstInitial.

Ex$.$ If the input is:

Julia Clark

the output is

Clark, is$.2\mathrm{.}12$ LAB Format IT $140$