Question: Use prompt() to let user type a number from the web page. If user enters nothing or strings, log Please enter a number! to console;

Use prompt() to let user type a number from the web page. If user enters nothing or strings, log "Please enter a number!" to console; If user enter 10, log "You win 10 point" to console; If user typed 8, log "You win 8 points to console If the number is not 8 or 10, log "NOT MATCHED!!" to consol

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