Windows Server 2012 R2 CALs

Are Windows Server 2012 and Windows Server 2012 R2 CALs the same thing? I would like to purchase additional User CALs for my 2012 R2 server, but I only find the option to purchase for 2012. For reference, it has been recommended that SKU R18-04281 will work for what I need. Can an expert confirm?
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OAC TechnologyProfessional NerdsAsked:
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K BCommented:
per:
 https://www.microsoft.com/en-us/licensing/product-licensing/windows-server-2012-r2.aspx

the licencing PDF states:
Note: Windows Server 2012 CALs are used to access Windows Server 2012 and Windows Server 2012 R2.

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Windows Server 2012

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