세션 ID : 5b2le878t0v5kpm22n51qh26f4
session1 :
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session2 :
Warning: Undefined array key "session2" in /users/2018/i1845024/public_html/2022/WebProg/ch10/exam10-08.php on line 14

session3 :
Warning: Undefined array key "session3" in /users/2018/i1845024/public_html/2022/WebProg/ch10/exam10-08.php on line 15

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