7
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What letters are missing from the end of this list?

AC     DI     IM     NI     TM
AG     DM     IR     NM     TU
AI     DN     IW     NT     TV
AL     DS     JN     OC     VN
AM     ED     KA     OM     VW
AP     EM     KO     RA     XT
AV     EN     LA     RO     YK
AW     HN     LF     SK     YN
CN     HO     LI     SM     YW
CS     IH     MN     TC     ??
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9
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The letters are the abbreviations of the 50 states backwards, and the last should be "ZA" for Arizona

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  • 2
    $\begingroup$ Welcome to Puzzling SE! Nice Answer! $\endgroup$ – SteveV Jul 27 at 2:29

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