%#!ptex \newcount\x \scrollmode \def\T#1{\x=`#1 \message{\the\x}} \def\漢{} \def\aaa{西}\T{\aaa}% err \def\AAA{s}\T{\AAA} % err \let\ccc=西\relax\T{\ccc} % err \T~ \T\a \T{漢} \T\漢 % err \end