\ybaselineshift10pt \parindent5pt \showboxbreadth10000 \showboxdepth10000 \tracingonline1 \setbox0=\vbox{\hsize=40pt% {\ybaselineshift0pt oお\par fiか\par \global\setbox4=\lastbox\unskip\unskip \global\setbox5=\lastbox\unskip\unskip } \leavevmode\hbox{}いi\par uう\par えe\par \setbox1=\lastbox\unskip\unskip \setbox2=\lastbox\unskip\unskip \setbox3=\lastbox\unskip\unskip \hsize=200pt \leavevmode\unhcopy3\unhcopy1\unhcopy4\unhcopy5\unhcopy2 %\showbox1\showbox2\showbox3\showbox4\showbox5 }\unvbox0 \end