Does the phrase "range for R1-1 through R10H" actually have an agreed-upon meaning?

I was recently sent a code test by a potential employer to complete on my own time. The first question has to do with identifying whether a given zoning code falls within a range of codes. I'm not looking for the actual solution (someone else already tried that on SO) and I already declined to take the test since I was frustrated by this question as well as another one that was about screen scraping where the site in question was down for maintenance.

My question is just whether the "ranges" described are ambiguous or not. Is there some standard that clearly defines what is meant by "M1-1/R5 – M1-6/R10"? There is a hint for the first range that seems to suggest that this could be a self-contained question that doesn't require any domain-specific knowledge, except many of the test inputs, like C4-4A (no letters mentioned in the range with C codes), seem like they wouldn't be in any of the ranges until you research the zoning codes in New York and discover that they are actually valid, as shown in this document. Here is the original question:

Question 1 Description: Write a method which accepts a list/array of codes and returns the code along with its description as JSON. Note that the range for R1-1 - R10H encompasses R1-1 to R10-10 and R1A to R10H.

Bonus: Write a unit test.

Description Data:
Codes               Descriptions
---------------------------------------------------------------
R1-1 - R10H         General Residence Districts
C1-6 - C8-4         Commercial Districts
M1-1 - M3-2         Manufacturing Districts
M1-1/R5 – M1-6/R10  Mixed Manufacturing & Residential Districts
BPC                 Battery Park City
PARK                New York City Parks
PARKNYS             New York State Parks
PARKUS              United States Parks
ZNA                 Zoning Not Applicable
ZR 11-151           Special Zoning District

Example output:
Given ['M3', 'R3-2', 'PARKNYS', 'M1-3/R9']
{
    "codes":[
        {"code":"M3", "description”:”Not found“},
        {"code":"R3-2", "description":"Residential Districts"},
        {"code":"PARKNYS", "description":"New York State Parks"},
        {"code":"M1-3/R9", "description":"Mixed Manufacturing & Residential Districts"}
    ]
}

Input:
The list is:
    R7A
    R8A
    C4-4A
    M3-2
    R8B
    C1-6A
    R7B
    R8X
    C1-7A
    PARK
    C1-9A
    R6
    C1-7
    C2-6
    R10
    C4-5
    C6-3X
    C1-6
    C6-2M
    C6-4M
    M2-4
    M1-5/R7X

UPDATE: The answer from MichaelT makes some good points, but I disagree that the hint in the first question gives you the complete list of zoning codes. It only does so for the first range.