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         sodipodi:role="line"
         id="tspan3705-4-6"
         style="fill:#000000;stroke-width:0.264583"
         x="59.340172"
         y="118.94403">$read()$:</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#999999;stroke-width:0.264583"
       x="23.457415"
       y="75.619804"
       id="text3750-7"><tspan
         sodipodi:role="line"
         id="tspan3748-4"
         style="fill:#999999;stroke-width:0.264583"
         x="23.457415"
         y="75.619804">$\not\sqsupseteq \{b\}$</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
       x="23.457415"
       y="84.598038"
       id="text3750-3-4"><tspan
         sodipodi:role="line"
         id="tspan3748-2-3"
         style="fill:#000000;stroke-width:0.264583"
         x="23.457415"
         y="84.598038">$\sqsupseteq \{b\} \to$ OK</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#999999;stroke-width:0.264583"
       x="23.457415"
       y="93.54969"
       id="text3750-0-0"><tspan
         sodipodi:role="line"
         id="tspan3748-6-7"
         style="fill:#999999;stroke-width:0.264583"
         x="23.457415"
         y="93.54969">$\not\sqsupseteq \{b\}$</tspan></text>
    <circle
       style="fill:#800080;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
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       cx="118.63729"
       cy="67.630196"
       r="2.7302806" />
    <circle
       style="fill:#800080;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
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       cx="67.201363"
       cy="124.91125"
       r="2.7302806" />
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
       x="72.653946"
       y="127.6125"
       id="text3750-9"><tspan
         sodipodi:role="line"
         id="tspan3748-3"
         style="fill:#000000;stroke-width:0.264583"
         x="72.653946"
         y="127.6125">$\to \{a\}$</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
       x="62.764446"
       y="146.3129"
       id="text4280-6"><tspan
         sodipodi:role="line"
         style="fill:#000000;stroke-width:0.264583"
         x="62.764446"
         y="146.3129"
         id="tspan2630">return $\{a\}$</tspan></text>
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       style="fill:#ff0000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
       id="path3663-3-0-7"
       cx="67.201363"
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       r="2.7302806" />
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
       x="72.653946"
       y="136.59073"
       id="text3750-3-6"><tspan
         sodipodi:role="line"
         id="tspan3748-2-0"
         style="fill:#000000;stroke-width:0.264583"
         x="72.653946"
         y="136.59073">$\to \{\}$</tspan></text>
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       style="fill:#ff0000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
       id="path3663-6-6-0-6"
       cx="174.36296"
       cy="124.91125"
       r="2.7302806" />
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
       x="179.81555"
       y="127.6125"
       id="text3750-9-1"><tspan
         sodipodi:role="line"
         id="tspan3748-3-8"
         style="fill:#000000;stroke-width:0.264583"
         x="179.81555"
         y="127.6125">$\to \{\}$</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
       x="162.7999"
       y="118.94403"
       id="text3707-5-3-7"><tspan
         sodipodi:role="line"
         id="tspan3705-4-6-5"
         style="fill:#000000;stroke-width:0.264583"
         x="162.7999"
         y="118.94403">$read()$:</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;stroke-width:0.264583"
       x="134.97845"
       y="132.58472"
       id="text3899"><tspan
         sodipodi:role="line"
         id="tspan3897"
         style="stroke-width:0.264583"
         x="134.97845"
         y="132.58472">;</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
       x="169.92604"
       y="146.3129"
       id="text4280-6-7"><tspan
         sodipodi:role="line"
         style="fill:#000000;stroke-width:0.264583"
         x="169.92604"
         y="146.3129"
         id="tspan2630-9">return $\{b\}$</tspan></text>
    <circle
       style="fill:#008000;stroke:none;stroke-width:0.499999;stroke-dasharray:none;stop-color:#000000"
       id="path3663-3-0-7-2"
       cx="174.36296"
       cy="133.94179"
       r="2.7302806" />
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;fill:#000000;stroke-width:0.264583"
       x="179.81555"
       y="136.59073"
       id="text3750-3-6-0"><tspan
         sodipodi:role="line"
         id="tspan3748-2-0-2"
         style="fill:#000000;stroke-width:0.264583"
         x="179.81555"
         y="136.59073">$\to \{b\}$</tspan></text>
    <text
       xml:space="preserve"
       style="font-size:8.46667px;line-height:1.25;font-family:sans-serif;text-align:end;text-anchor:end;fill:#ff0000;stroke-width:0.264583"
       x="259.75"
       y="135.53111"
       id="text9043"><tspan
         sodipodi:role="line"
         id="tspan9041"
         style="fill:#ff0000;stroke-width:0.264583"
         x="259.75"
         y="135.53111">${\Large\textbf{??!}}$~~~~~</tspan><tspan
         sodipodi:role="line"
         style="fill:#ff0000;stroke-width:0.264583"
         x="259.75"
         y="146.11446"
         id="tspan9372">$\{a\} \not\sqsubseteq \{b\}$</tspan></text>
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