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select s.seat_no, (substring(s.seat_no from 0 for 3)) as rows_count, trim( both 'QWERTYUIOPLKJHGFDSAZXCVBNM' from s.seat_no) as n, count(s.*) as seats_count from seats s inner join aircrafts_data a on a.aircraft_code = s.aircraft_code and a.model->>'en' = 'Boeing 777-300' group by s.seat_no order by (substring(s.seat_no from 0 for 3)) desc

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