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              - var d = 2000, l = .1*d, h = .5*l;
- var oy = -.59*d;
- var b = 1.25*l, m = b + .5*l, db = b - l;
- var u = 2, hu = .5*u;
- var sw = .005*d, fs = Math.round(.07*d);
- var na = Math.round(.05*fs);

svg(viewBox=[oy - .25*d, oy, 2*d, 1.5*d].join(' ')
		xmlns='http://www.w3.org/2000/svg' 
		xmlns:xlink='http://www.w3.org/1999/xlink')
	style
		| tspan { font-size: .5em }
		| g [d] {
		| 	fill: none;
		| 	stroke: #ccc;
		| 	stroke-width: #{sw};
		| 	stroke-linecap: round
		| }
		| g {
		| 	font: #{fs}px consolas, monaco, monospace;
		| 	letter-spacing: #{-.2*fs}px
		| }
		| g [d] + *, #g g * { stroke: #333 }
		| marker[id], [x] { stroke: none; fill: #333 }
		| g g {
		| 	marker-start: url(#s);
		| 	marker-end: url(#e)
		| }
		| g + * + [d] {
		| 	stroke: #f90;
		| 	stroke-width: #{3*sw};
		| 	stroke-dasharray: #{u} #{l - u}
		| }
		| g + [d] {
		| 	stroke-width: #{2*sw};
		| 	stroke-dasharray: #{u} #{.5*h - u}
		| }
		| g ~ [x] {
		|		fill: #95a;
		| 	font: #{fs}px comic sans ms, noteworthy, dancing script ot, ubuntu, cursive
		| }
		| use ~ [x] { fill: #b53 }
	marker#s(markerWidth=na markerHeight=na 
						viewBox='-8 -4 8 8' orient='auto' refX='-7')
		path(d='M-8 0 0-4V4')
	marker#e(markerWidth=na markerHeight=na 
					 viewBox='0 -4 8 8' orient='auto' refX='7')
		path(d='M8 0 0-4V4')
	g
		text(x=Math.round(l - .63*fs) y=Math.round(.7*fs - b)) 1·l
		text(x=Math.round(1.5*l - .63*fs) y=Math.round(.2*fs - 2*b)) 2·l
		text(x=Math.round(2.75*l - .63*fs) y=Math.round(.2*fs - 3*b)) i·l
		text(x=Math.round(4*l - 2*fs) y=Math.round(-4*b))
			| (n<tspan dx='#{Math.round(.15*fs)}'>c </tspan>-1)·l
		text(x=Math.round(.4*fs - m) y=Math.round(l + .3*fs)) 1·l
		text(x=-Math.round(m + b + .3*fs) y=Math.round(1.5*l + .3*fs)) 2·l
		text(x=-(m + 2*b + .3*fs) y=(2.75*l + .3*fs)) j·l
		text(x=-(m + 3*b + 2*fs) y=Math.round(4*l + .3*fs))
			| (n<tspan dx='#{Math.round(.15*fs)}'>r </tspan>-1)·l
	g#g
		path(d=`M${h}${-4*b}V${h}H${3.2*l}
						M${4.3*l} ${h}h${1.4*l}M${6.8*l} ${h}h${.7*l}
						M${1.5*l}${-b}V${1.5*l}H${3.2*l}
						M${4.3*l} ${1.5*l}h${1.4*l}M${6.8*l} ${1.5*l}h${.7*l}
						M${2.5*l}${-2*b}V${2.5*l}H${3.2*l}
						M${4.3*l} ${2.5*l}h${1.4*l}M${6.8*l} ${2.5*l}h${.7*l}
						M${5*l}${-3*b}V${3.2*l}
						M${5*l} ${4.3*l}v${.7*l}h${.7*l}M${6.8*l} ${5*l}h${.7*l}
						M${7.5*l}${-4*b}V${3.2*l}
						M${7.5*l} ${4.3*l}v${1.4*l}M${7.5*l} ${6.8*l}v${.7*l}`)
		path(d=`M0 0h${3*l}v${3*l}M${2*l} 0v${2*l}h${l}M${l} 0v${l}h${2*l}
						M${4.5*l} 0v${3*l}h${l}V0z
						M${4.5*l} ${l}h${l}v${l}h${-l}
						M${7*l} 0v${3*l}h${l}V0z
						M${7*l} ${l}h${l}v${l}h${-l}
						M${4.5*l} ${4.5*l}h${l}v${l}
						M${7*l} ${4.5*l}h${l}v${l}h${-l}z
						M${7*l} ${7*l}h${l}v${l}`)
		g
			path(d=`M${1.5*l}${db - b}h${.7*l}M${-.2*l}${db - b}h${.7*l}`)
			path(d=`M${h}${db - 2*b}h${2*l}`)
			path(d=`M${h}${db - 3*b}h${4.5*l}`)
			path(d=`M${h}${db - 4*b}h${7*l}`)
		path(d=`M${3.5*l - hu} ${h}h${.75*l}M${6*l - hu} ${h}h${.75*l}
						M${3.5*l - hu} ${1.5*l}h${.75*l}M${6*l - hu} ${1.5*l}h${.75*l}
						M${3.5*l - hu} ${2.5*l}h${.75*l}M${6*l - hu} ${2.5*l}h${.75*l}
						M${6*l - hu} ${5*l}h${.75*l}
						M${5*l} ${3.5*l}v${.75*l}
						M${7.5*l} ${3.5*l}v${.75*l}M${7.5*l} ${6*l}v${.75*l}`)
		path(d=`M${h - hu} ${h}h${3*l}
						M${5*l - hu} ${h}h${l}M${7.5*l - hu} ${h}h${u}
						M${1.5*l - hu} ${1.5*l}h${2*l}
						M${5*l - hu} ${1.5*l}h${l}M${7.5*l - hu} ${1.5*l}h${u}
						M${2.5*l - hu} ${2.5*l}h${l}
						M${5*l - hu} ${2.5*l}h${l}M${7.5*l - hu} ${2.5*l}h${u}
						M${5*l - hu} ${5*l}h${l}M${7.5*l - hu} ${5*l}h${u}
						M${7.5*l - hu} ${7.5*l}h${u}`)
	text(x=8*l + .2*fs y=-.2*fs) rows:
	text(x=8*l + .2*fs y=(h + .3*fs)) 0
	text(x=8*l + .2*fs y=(1.5*l + .3*fs)) 1
	text(x=8*l + .2*fs y=(2.5*l + .3*fs)) 2
	text(x=8*l + .2*fs y=(5*l + .3*fs)) j
	text(x=8*l + .2*fs y=(7.5*l + .3*fs)) n<tspan>r</tspan>-1
	use(xlink:href='#g' 
			transform='rotate(45) scale(1 -1) rotate(-45)')
	text(x=-4*fs y=8*l + fs) columns:
	text(x=.5*l - .3*fs y=8*l + fs) 0
	text(x=1.5*l - .3*fs y=8*l + fs) 1
	text(x=2.5*l - .3*fs y=8*l + fs) 2
	text(x=5*l - .3*fs y=8*l + fs) i
	text(x=7.5*l - .8*fs y=8*l + fs) n<tspan>c</tspan>-1

// minimal SVG
<svg viewBox='-1680 -1180 4000 3000' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink'><style>tspan{font-size:.5em}g [d]{fill:none;stroke:#ccc;stroke-width:10;stroke-linecap:round}g{font:140px consolas,monaco,monospace;letter-spacing:-28px}g [d]+*,#g g *{stroke:#333}marker[id],[x]{stroke:none;fill:#333}g g{marker-start:url(#s);marker-end:url(#e)}g+*+[d]{stroke:#f90;stroke-width:30;stroke-dasharray:2 198}g+[d]{stroke-width:20;stroke-dasharray:2 48}g~[x]{fill:#95a;font:140px comic sans ms,noteworthy,dancing script ot,ubuntu,cursive}use~[x]{fill:#b53}</style><marker id='s' markerWidth='7' markerHeight='7' viewBox='-8 -4 8 8' orient='auto' refX='-7'><path d='M-8 0 0-4V4'/></marker><marker id='e' markerWidth='7' markerHeight='7' viewBox='0 -4 8 8' orient='auto' refX='7'><path d='M8 0 0-4V4'/></marker><g><text x='112' y='-152'>1·l</text><text x='212' y='-472'>2·l</text><text x='462' y='-722'>i·l</text><text x='520' y='-1000'>(n<tspan dx=21>c </tspan>-1)·l</text><text x='-294' y='242'>1·l</text><text x='-642' y='342'>2·l</text><text x='-892' y='592'>j·l</text><text x='-1380' y='842'>(n<tspan dx=21>r </tspan>-1)·l</text></g><g id='g'><path d='M100-1000V100H640M860 100h280M1360 100h140M300-250V300H640M860 300h280M1360 300h140M500-500V500H640M860 500h280M1360 500h140M1000-750V640M1000 860v140h140M1360 1000h140M1500-1000V640M1500 860v280M1500 1360v140'/><path d='M0 0h600v600M400 0v400h200M200 0v200h400M900 0v600h200V0zM900 200h200v200h-200M1400 0v600h200V0zM1400 200h200v200h-200M900 900h200v200M1400 900h200v200h-200zM1400 1400h200v200'/><g><path d='M300-200h140M-40-200h140'/><path d='M100-450h400'/><path d='M100-700h900'/><path d='M100-950h1400'/></g><path d='M699 100h150M1199 100h150M699 300h150M1199 300h150M699 500h150M1199 500h150M1199 1000h150M1000 700v150M1500 700v150M1500 1200v150'/><path d='M99 100h600M999 100h200M1499 100h2M299 300h400M999 300h200M1499 300h2M499 500h200M999 500h200M1499 500h2M999 1000h200M1499 1000h2M1499 1500h2'/></g><text x='1628' y='-28'>rows:</text><text x='1628' y='142'>0</text><text x='1628' y='342'>1</text><text x='1628' y='542'>2</text><text x='1628' y='1042'>j</text><text x='1628' y='1542'>n<tspan>r</tspan>-1</text><use xlink:href='#g' transform='rotate(45) scale(1-1) rotate(-45)'/><text x='-560' y='1740'>columns:</text><text x='58' y='1740'>0</text><text x='258' y='1740'>1</text><text x='458' y='1740'>2</text><text x='958' y='1740'>i</text><text x='1388' y='1740'>n<tspan>c</tspan>-1</text></svg>
            
          
!
            
              body {
	display: flex;
	flex-direction: column;
	margin: 0;
	height: 100vh;
}
            
          
!
999px
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