tell me the difference between patient 9801's total input and the patient's total output since 1399 days ago.
select ( select sum(inputevents_cv.amount) from inputevents_cv where inputevents_cv.icustay_id in ( select icustays.icustay_id from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 9801 ) ) and datetime(inputevents_cv.charttime) >= datetime(current_time,'-1399 day') ) - ( select sum(outputevents.value) from outputevents where outputevents.icustay_id in ( select icustays.icustay_id from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 9801 ) ) and datetime(outputevents.charttime) >= datetime(current_time,'-1399 day') )