Lets start by saying that the ' character in MAZE'N is not a comma.
It is an apostrophe (also called a Single Quote)
You have not told us what type of data table you are trying to do the INSERT into - a VFP data table or something else such as SQL Server.
For now I'll assume that it is a VFP data table.
The VFP language can use either double quotes or single quotes on character values.
You merely have to start and end the character string with the same type.
Example:
"You can't do this" <-- note use of double quotes outside of character string
'Say "HI" to Bill' <- single quotes around string.
Both of those character strings would work and the quotes used INSIDE the string would be retained.
Good Luck