This is TeX, Version 3.1415926 (no format preloaded) (q.2 \def\o{~\let~\s~\string~\def~~~{~\s~~~\s~}~\message~{~\s~\def~\s~\o~{~\o~}~\let ~~~\expandafter~\s~\o~}\batchmode }\let ~\expandafter\o