
please extract 10 keywords and their respective score based on importance from the paragraph and sort the result by score, only print keywords and score without other words, the paragraph is :[HC]:HE2E:ENG:N:Able to add and execute cascade hint to non call statements via alter system add statement hint option.Could you please have a look for this issue?

Hint with cascade should not works at non call statement,
but we can execute this statement successfully:
ALTER SYSTEM ADD STATEMENT HINT ( NO_USE_HEX_PLAN CASCADE ) FOR SELECT * FROM T1;

Thanks for your help. Your answer should have exactly 10 paragraphs. Make sure that the last paragraph starts with the word "difficult" and that each paragraph is separated by two new lines.
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