E/P/J - English (US) / Pal (Europe/Australia) / Japanese (Japan)
E/P/J - English (US) / Pal (Europe/Australia) / Japanese (Japan)
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Normally E/P/J represents region. In demos the serial code structure is LNZ-CTR-(A/C/H)(Game's name of #s and letters)(E/P/J)-REGION
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Where REGION is either EUR, USA, or JAP for Europe, United States, and Japan respectively. So demos have an extra identifier at the end of their serial structures.