how many days have passed since patient 12775 first stayed in their current hospital encounter in the ward 23?
select 1 * ( strftime('%j',current_time) - strftime('%j',transfers.intime) ) from transfers where transfers.icustay_id in ( select icustays.icustay_id from icustays where icustays.hadm_id in ( select admissions.hadm_id from admissions where admissions.subject_id = 12775 and admissions.dischtime is null ) ) and transfers.wardid = 23 order by transfers.intime asc limit 1