\input finstmsc.sty
\adddriver{pltotf}{v1915test.sh}
\input v1914test.recs
\donedrivers
\setstr{TFMfileprefix}{:a:b:c:}
\adddriver{pltotf}{v1915test.sh2}
\input v1913test.recs
\donedrivers
\bye