In any case, the correct approach is to inform the user that a 1976 X-rated musical fantasy Alice film isn't a known or publicly available work. However, there are other Alice in Wonderland films, like the 1951 Disney animated version, or the 1978 horror film. The X rating might have been a misclassification or a misunderstanding of the content. It's also possible that the user is referring to a parody or a different work. The response should clarify the known films and address possible confusions.
Another angle: the X rating might not be official. Sometimes, films are labeled X for their mature themes or for the times. In the 1970s, certain films might have been considered risqué but not necessarily officially X-rated today. Let me search for 1976 films, X-rated, Alice in Wonderland.
Wait, in 1976, there was a film called "Alice in Wonderland" directed by Gene Wilder. He co-wrote and starred in it with Jerry Lewis as the Mad Hatter. But Wilder's Alice was for all ages, not X-rated. So that's not it. Then there's the 1976 version directed by Martin Rosen, which is an animated film, again family-friendly. So perhaps the user is referring to a different version.