<p>性別(任意)</p>
<input id="man" type="radio" name="sex1" value="man">
<label for="man">男性</label>
<input id="woman" type="radio" name="sex2" value="woman">
<label for="woman">女性</label>
<input id="unknown" type="radio" name="sex3" value="unknown">
<label for="man">その他</label>

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