$4\mathrm{.}14$ LAB: Count input length without spaces, periods, or commas

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: $"r","2","$l$")$