when was the first intake time until 04/13/2105 for patient 3369?
select inputevents_cv.charttime 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 = 3369 ) ) and strftime('%y-%m-%d',inputevents_cv.charttime) <= '2105-04-13' order by inputevents_cv.charttime asc limit 1