xsub = \markup { fifteen inventions for keyboard instruments }
xcomp = \markup { Tucker Johnson }
xinst = \markup { keyboard }
-xdur = \markup { "30\" - 15\'" }
+xdur = \markup { "20\" - 12\'" }
xcr = \markup \tiny { Copyright \char ##x00A9 MMXXIII Umbel Press. }
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