\hyphenpenalty10000 \exhyphenpenalty10000 \pretolerance10000 % no hyphens
\newbox\dbox \setbox\dbox=\hbox to .4em{\hss.\hss} % dot box for leaders
\newskip\rrskipb \rrskipb=0.5em plus3em % ragged right space before break
\newskip\rrskipa \rrskipa=-0.17em plus-3em % ragged right space after break
\newskip\rlskipa \rlskipa=0pt plus3em % ragged left space after break
\newskip\rlskipb \rlskipb=0.33em plus-3em % ragged left space before break
\newskip\lskip \lskip=3.3\wd\dbox plus1fil minus0.3\wd\dbox % for leaders
\newskip\lskipa \lskipa=-2.67em plus-3em minus0.11em % after leaders
\mathchardef\rlpen=1000 \mathchardef\leadpen=600 % constants used
\def\rrspace{\nobreak\hskip\rrskipb\penalty0\hskip\rrskipa}
\def\rlspace{\penalty\rlpen\hskip\rlskipb\vadjust{}\nobreak\hskip\rlskipa}
\uccode`~=` \uppercase{
  \def\:{\nobreak\hskip\rrskipb \penalty\leadpen \hskip\rrskipa
    \vadjust{}\nobreak\leaders\copy\dbox\hskip\lskip
    \kern3em \penalty\leadpen \hskip\lskipa
    \vadjust{}\nobreak\hskip\rlskipa \let~=\rlspace}
  \everypar{\hangindent=1.5em \hangafter=1 \let~=\rrspace}}
\uccode`~=0 \parindent=0pt \parfillskip=0pt
\font\tr=timesroman at 9truebp
\tr

\hsize=3.5in
{\obeyspaces ACM Symposium on Theory of Computing, Eighth Annual (Hershey, %
PA., 1976)\:1879, 4813, 5414, 6918, 6936, 6937, 6946, 6951, %
6970, 7619, 9605, 10148, 11676, 11687, 11692, 11710, 13869\par}
\vskip 6pt

\hsize=2.0in
{\obeyspaces ACM Symposium on Theory of Computing, Eighth Annual (Hershey, %
PA., 1976)\:1879, 4813, 5414, 6918, 6936, 6937, 6946, 6951, %
6970, 7619, 9605, 10148, 11676, 11687, 11692, 11710, 13869\par}
\vskip 6pt

\hsize=1.5in
{\obeyspaces ACM Symposium on Theory of Computing, Eighth Annual (Hershey, %
PA., 1976)\:1879, 4813, 5414, 6918, 6936, 6937, 6946, 6951, %
6970, 7619, 9605, 10148, 11676, 11687, 11692, 11710, 13869\par}
\vskip 6pt


\vfill\eject
\end