ืืื ืืื ืืืคืืืืืืื ืืคืืืืืืื C2: ืืืฆืจ ืืืืื ืืืื ื ืฉื ืืืจื ืืืคืืืืืื, ืืกืืืื ืืืืื ืืืช ืืื ืืืืืืช.
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