Review X & .Typing PracticeCourseTouch Typing PracticeUnitBottom RowTargetStrengthen Below with the Bottom Row Contentlx s.xs. l. lsx.l sx.sl xl.s xs .xl .s xlxs. lxls. lxs .xls. ls x. xl. s.xsl sx.l .sxl. xlsx l.s.s xl sx l.l x.s x.lsx .slxs l. Start Practice Prev: Learn X & . Next: Practice X & .