Python Question:
trying to get this down but im just stuck.
Heres the question:

Given a line of text as input, output the number of characters excluding spaces, periods, or commas.
Ex: If the input is: 'Listen, Mr. Jones, calm down.'
the output is: 21
Note: Account for all characters that aren't spaces, periods, or commas (Ex: "r", "2", "!").

Digital information is stored using a series of ones and zeros. computers are digital machines because they can only read information as on or off –1 or 0. this method of computation is known as the system

1. you have a small business that is divided into 3 departments: accounting, sales, and administration. these departments have the following number of devices (computers, printers, etc.): accounting-31, sales-28, and administration-13. using a class c private network, subnet the network so that each department will have their own subnet. you must show/explain how you arrived at your conclusion and also show the following: all available device addresses for each department, the broadcast address for each department, and the network address for each department. also, determine how many "wasted" (not usable) addresses resulted from your subnetting (enumerate them).

Whats three fourths of 15(this is supposed to be in math but i clicked too fast)