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%!TEX TS-program = pdftex \catcode`@=11 \long\def\@firstoftwo#1#2{#1} \long\def\@secondoftwo#1#2{#2} \def\first#1{\@firstoftwo#1} \def\last#1{\@secondoftwo#1} \catcode`@=12 \first{{+tokens1+}{--tokens2--}} \last{{+tokens1+}{--tokens2--}} \bye Of course, if you don't have (or want) anything to do with LaTeX. There's no need for \@firstoftwo while ...



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