Conditionally Show and Hide Input Text

JDev 11.1.1.5.0
I have two input texts PROFILE and SCORE.
SCORE is shown only if my value in PROFILE is E or F.
And if, it should be hidden once the PROFILE value is changed to some other value.
Also, please note SCORE field should be mandatory if the PROFILE value is E or F.
Here is the code what I tried so far:
<af:inputText value="#{bindings.Profile.inputValue}"
                                          label="#{Resources.PROFIL}"
                                          required="true"
                                          columns="#{bindings.Profile.hints.displayWidth}"
                                          maximumLength="1"
                                          shortDesc="#{bindings.Profile.hints.tooltip}"
                                          id="it94" autoSubmit="true">
      <f:validator binding="#{bindings.PsamProfile.validator}"/>
</af:inputText>
<af:inputText value="#{bindings.Score.inputValue}"
                                        label="#{Resources.SCORE}"
                                        required="#{bindings.Profile.inputValue == 'E' or bindings.Profile.inputValue == 'F'}"
                                        columns="#{bindings.Score.hints.displayWidth}"
                                        maximumLength="#{bindings.Score.hints.precision}"
                                        shortDesc="#{bindings.Score.hints.tooltip}"
                                        id="it164"
                                        visible="#{bindings.Profile.inputValue == 'E' or bindings.Profile.inputValue == 'F'}"
                                        partialTriggers="it94"
                                        contentStyle="text-align:left;"
                                        autoSubmit="true">
                            <f:validator binding="#{bindings.Score.validator}"/>
                            <af:convertNumber groupingUsed="false"
                                              pattern="#{bindings.Score.format}"/>
  </af:inputText>
I have tried using a parent component and using rendered attribute for the SCORE field as explained in https://blogs.oracle.com/Didier/entry/only_rendered_adf_faces_compon, but it still didn't help.

Forgot the PROBLEM part
PROBLEM is: If I change the PROFILE value to some other value than E or F, the SCORE field is not getting hidden as expected and in fact it is throwing a mandatory validation.

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