Drawing line with a specified endpoint (feet and inches)

I am seeking help in how to draw a line with a specified endpoint in feet and inches, but I receive an 'Expression Syntax Error' because LibreCad doesn't understand my input. I began the drawing by setting the workspace units to 'Architectural'. The line I want to draw is 23 and 5/8ths inches long (just under two feet in length) with the startpoint @ 0,0,0.  Here are the steps I entered from the command line:

[Command]: line
[Specify first point]: 0,0,0
[Specify second point] ; 1'-11 5/8",0
[Message from LibreCad]: Expression Syntax Error

What is the correct syntax for expressing 23-5/8" ?

Support for imperial units is a bit limited in LibreCAD. 'Architectural' applies only to how it is shown in dimensions and in the status bar. For input you can only use inches.
 
As a workaround for 23-5/8" type 23*12+5/8 .

It works! I neglected to say thank you in a timely manner, so THANK YOU! :)

Most often we have to draw in feet and inches.
So wherever you are writing just use the format given below.
The default is Architectural inches.
So for

1. 5 feet
Write 5 * 12 in input box.
Note the asterik in the above

2. 5 feet 2 inches
Wrte 5 * 12 + 2 in the input box
Librecad automatically converts the above values.

The input box is at the top whenever you select 2 end points and Horizontal.