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ก150–โ–ฺ ‰๑“šŒ‹‰สก
•sณ‰๐I
ณ@‰๐Fprincipal
Žž@ŠิF604•b
ณ‰๐”F29–โ

‘ๆ151–โ–ฺ
Œ‹‰สEi = resultj
purpose
outcome
solution
content
occasion


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