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9 <formula type="literal">C</formula>
10 <formula type="literal">D</formula>
16 <formula type="literal">D</formula>
18 <formula type="literal">A</formula>
22 <formula type="literal">B</formula>
24 <formula type="literal">D</formula>
29 <formula type="literal">B</formula>
31 <formula type="literal">C</formula>