BNF -
Above 23148 will test 23760 , if cross 23860 even 24150 possible.
Below 23148 will retest 22466. If Retest fails 21025 possible
Above 23148 will test 23760 , if cross 23860 even 24150 possible.
Below 23148 will retest 22466. If Retest fails 21025 possible