This is TeX, Version 3.141592 (Web2C 7.5.4) (INITEX)  17 APR 2006 23:49
**kerning_test.tex
(./kerning_test.tex (/usr/share/texmf/tex/plain/base/plain.tex
Preloading the plain format: codes, registers,
\maxdimen=\dimen10
\hideskip=\skip10
\centering=\skip11
\p@=\dimen11
\z@=\dimen12
\z@skip=\skip12
\voidb@x=\box10
 parameters,
\smallskipamount=\skip13
\medskipamount=\skip14
\bigskipamount=\skip15
\normalbaselineskip=\skip16
\normallineskip=\skip17
\normallineskiplimit=\dimen13
\jot=\dimen14
\interdisplaylinepenalty=\count23
\interfootnotelinepenalty=\count24
 fonts, more fonts,
\itfam=\fam4
\slfam=\fam5
\bffam=\fam6
\ttfam=\fam7

macros,
\strutbox=\box11
\mscount=\count25
\tabs=\box12
\tabsyet=\box13
\tabsdone=\box14
 math definitions,
\rootbox=\box15
\p@renwd=\dimen15
 output routines,
\headline=\toks10
\footline=\toks11
\footins=\insert254
\topins=\insert253
 hyphenation
(/usr/share/texmf/tex/generic/hyphen/hyphen.tex))
> 18.432pt.
l.46 \showthe\wd0
                 
? 
> 19.552pt.
l.48 \showthe\wd1
                 
? 
 )
No pages of output.