\def\trcent#1{
  \gdef\@TRcent{#1}}
\gdef\@TRcent{20}

\def\tryear#1{
  \gdef\@TRyear{#1}
  \gdef\@TRyeari{#1}}
\gdef\@TRyear{200n}

\def\tryeari#1{
  \gdef\@TRyeari{#1}}
\gdef\@TRyeari{200n}

