SQL*Loader and data enclosed by single quotes

Hello,
I need to migrate some data from Sybase to Oracle. Can't use the Migration Workbench because this is Sybase's SQL Anywhere product. We are therefore trying to load via SQL*Loader.
Sybase outputs its data into text files and encloses it with single quotes, like:
'ABC123',
'UR94LL',
'7YUHII'
We are running into a problem because we cannot figure out how to use the OPTIONALLY ENCLOSED BY parameter with single quotes. If we just use the FIELDS TERMINATED BY parameter, then the entire string, including the quotation marks, gets loaded into the Oracle table. This causes bad records to be created when the data is exactly the length of the column width - the two quotation markss make the field longer than is allowed in the table. Plus - the data shouldn't have quotes around it in normal situations.
We can do 'Find and Replace' to replace the single quotation marks with double quotations, but some of the Sybase tables are huge, and we'd like to avoid having to open and edit them. However, if this is the only way to go, then we'll have to use it. I just wondered whether anyone had run into this before and been able to solve it.
Thanks.
-melissa

We are running into a problem because we cannot figure out how to use the OPTIONALLY ENCLOSED BY parameter with single quotesTry
OPTIONALLY ENCLOSED BY X'27'http://download-uk.oracle.com/docs/cd/B10501_01/server.920/a96652/ch06.htm#1015083

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