2014% %2014% 2014% %2014%;%2014%
(^%[0-9]{4};?$)+|(^[0-9]{4}%;?$)+|(^%[0-9]{4}%;?$)+
^%\d{4}%$|^\d{4}%$|^%\d{4}$|^(%\d{4}%);\1$
var
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