From St. Robert C.H.S., University of Waterloo

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$$\displaystyle \require{enclose} \def\uline#1#2{\enclose{updiagonalstrike}{\phantom{\Rule{#1em}{#2em}{0em}}}} \def\dline#1#2{\enclose{downdiagonalstrike}{\phantom{\Rule{#1em}{#2em}{0em}}}} % \def\place#1#2#3{\smash{\rlap{\hskip{#1em}\raise{#2em}{#3}}}} % \hskip 1em % \place{0}{12.2}{\bullet} \place{2}{0}{\bullet} \place{4.1}{4}{\bullet} \place{6.1}{0}{\bullet} \place{8.1}{8}{\bullet} \place{10.1}{0}{\bullet} \place{12.1}{4}{\bullet} \place{14.1}{0}{\bullet} \place{16.1}{12}{\bullet} % \place{.3}{4.4}{\dline{3.6}{7.6}} \place{2.3}{.5}{\uline{1.6}{3.6}} \place{4.3}{.4}{\dline{1.6}{3.6}} \place{4.3}{4.4}{\uline{3.6}{3.7}} \place{8.3}{4.4}{\dline{3.6}{3.6}} \place{10.3}{.5}{\uline{1.6}{3.6}} \place{12.3}{.4}{\dline{1.6}{3.6}} \place{12.2}{4.4}{\uline{3.7}{7.6}} \hskip18em\Rule{0em}{14em}{1.5em} $$