
\font\test=cmss10 at 20pt
\hsize=125pt
\hfuzz30pt

\hyphenation{hyphen{before}{after}{}ation abcdef{-}{}{}wxyz}
{

xxx {\test hyphenation} xxx

{xxx \test hyphenation xxx

}

xxxxxxxxx {\test abcdef\-wxyz} xxx

xxxxxxxxx {\test abcdefwxyz} xxx


}

\bigskip


\hyphenation{hyphen{before}{aftera}{a}tion abcdef{-}{w}{w}xyz}
{

xxx {\test hyphenation} xxx

{xxx \test hyphenation xxx

}

xxxxxxxxx {\test abcdef\-wxyz} xxx

xxxxxxxxx {\test abcdefwxyz} xxx


}

\bye