diff --git a/in/img/rwx.svg b/in/img/rwx.svg
index 7a2a9ee..f3ad97f 100644
--- a/in/img/rwx.svg
+++ b/in/img/rwx.svg
@@ -4,51 +4,51 @@
 <!-- Generated by graphviz version 2.43.0 (0)
  -->
 <!-- Title: index Pages: 1 -->
-<svg width="118pt" height="119pt"
- viewBox="0.00 0.00 118.50 119.00" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 115)">
+<svg width="116pt" height="116pt"
+ viewBox="0.00 0.00 116.20 116.40" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
+<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 112.4)">
 <title>index</title>
 <!-- x -->
 <g id="node1" class="node">
 <title>x</title>
-<ellipse fill="#303030" stroke="#00a000" stroke-width="2" cx="54" cy="-93" rx="18" ry="18"/>
-<text text-anchor="middle" x="54" y="-89.3" font-family="DejaVu Sans" font-size="14.00" fill="#ffffff">X</text>
+<ellipse fill="#303030" stroke="#00a000" stroke-width="2" cx="54" cy="-90.4" rx="18" ry="18"/>
+<text text-anchor="middle" x="54" y="-86.7" font-family="DejaVu Sans" font-size="14.00" fill="#ffffff">x</text>
 </g>
 <!-- r -->
 <g id="node2" class="node">
 <title>r</title>
-<ellipse fill="#303030" stroke="#d00000" stroke-width="2" cx="18" cy="-19.5" rx="18" ry="18"/>
-<text text-anchor="middle" x="18" y="-15.8" font-family="DejaVu Sans" font-size="14.00" fill="#ffffff">R</text>
+<ellipse fill="#303030" stroke="#d00000" stroke-width="2" cx="18" cy="-18.2" rx="18" ry="18"/>
+<text text-anchor="middle" x="18" y="-14.5" font-family="DejaVu Sans" font-size="14.00" fill="#ffffff">r</text>
 </g>
 <!-- x&#45;&gt;r -->
-<g id="edge4" class="edge">
+<g id="edge3" class="edge">
 <title>x&#45;&gt;r</title>
-<path fill="none" stroke="#00a000" stroke-width="2" d="M46.19,-76.48C41.57,-67.3 35.61,-55.46 30.36,-45.04"/>
-<polygon fill="#00a000" stroke="#00a000" stroke-width="2" points="33.42,-43.34 25.8,-35.98 27.17,-46.49 33.42,-43.34"/>
+<path fill="none" stroke="#00a000" stroke-width="2" d="M46.19,-74.16C41.68,-65.36 35.89,-54.08 30.73,-44.03"/>
+<polygon fill="#00a000" stroke="#00a000" stroke-width="2" points="33.72,-42.19 26.05,-34.89 27.49,-45.38 33.72,-42.19"/>
 </g>
 <!-- w -->
 <g id="node3" class="node">
 <title>w</title>
-<ellipse fill="#303030" stroke="#0000ff" stroke-width="2" cx="91" cy="-19.5" rx="19.5" ry="19.5"/>
-<text text-anchor="middle" x="91" y="-15.8" font-family="DejaVu Sans" font-size="14.00" fill="#ffffff">W</text>
+<ellipse fill="#303030" stroke="#0000ff" stroke-width="2" cx="90" cy="-18.2" rx="18.4" ry="18.4"/>
+<text text-anchor="middle" x="90" y="-14.5" font-family="DejaVu Sans" font-size="14.00" fill="#ffffff">w</text>
 </g>
 <!-- r&#45;&gt;w -->
-<g id="edge1" class="edge">
+<g id="edge4" class="edge">
 <title>r&#45;&gt;w</title>
-<path fill="none" stroke="#d00000" stroke-width="2" d="M33.68,-10.39C43.86,-6.09 54.04,-4.95 64.22,-6.96"/>
-<polygon fill="#d00000" stroke="#d00000" stroke-width="2" points="63.4,-10.36 73.98,-9.85 65.39,-3.65 63.4,-10.36"/>
+<path fill="none" stroke="#d00000" stroke-width="2" d="M33.75,-27.43C43.96,-31.74 54.18,-32.78 64.39,-30.57"/>
+<polygon fill="#d00000" stroke="#d00000" stroke-width="2" points="65.71,-33.83 74.18,-27.46 63.59,-27.16 65.71,-33.83"/>
 </g>
 <!-- w&#45;&gt;x -->
-<g id="edge3" class="edge">
+<g id="edge2" class="edge">
 <title>w&#45;&gt;x</title>
-<path fill="none" stroke="#0000ff" stroke-width="2" d="M82.34,-37.23C77.69,-46.22 71.86,-57.48 66.71,-67.44"/>
-<polygon fill="#0000ff" stroke="#0000ff" stroke-width="2" points="63.52,-65.99 62.03,-76.48 69.73,-69.21 63.52,-65.99"/>
+<path fill="none" stroke="#0000ff" stroke-width="2" d="M81.95,-34.89C77.4,-43.77 71.6,-55.08 66.47,-65.09"/>
+<polygon fill="#0000ff" stroke="#0000ff" stroke-width="2" points="63.26,-63.67 61.81,-74.16 69.49,-66.86 63.26,-63.67"/>
 </g>
 <!-- w&#45;&gt;r -->
-<g id="edge2" class="edge">
+<g id="edge1" class="edge">
 <title>w&#45;&gt;r</title>
-<path fill="none" stroke="#0000ff" stroke-width="2" d="M73.98,-29.15C63.8,-33.17 53.62,-34.04 43.44,-31.76"/>
-<polygon fill="#0000ff" stroke="#0000ff" stroke-width="2" points="44.28,-28.35 33.68,-28.61 42.12,-35.01 44.28,-28.35"/>
+<path fill="none" stroke="#0000ff" stroke-width="2" d="M74.18,-8.94C63.97,-4.65 53.75,-3.61 43.54,-5.84"/>
+<polygon fill="#0000ff" stroke="#0000ff" stroke-width="2" points="42.21,-2.59 33.75,-8.97 44.34,-9.26 42.21,-2.59"/>
 </g>
 </g>
 </svg>