what are the five drugs prescribed to the male patients aged 30s most often within 2 months after they have been diagnosed with ac posthemorrhag anemia until 2104?
select t3.drug from ( select t2.drug, dense_rank() over ( order by count(*) desc ) as c1 from ( select admissions.subject_id, diagnoses_icd.charttime from diagnoses_icd join admissions on diagnoses_icd.hadm_id = admissions.hadm_id where diagnoses_icd.icd9_code = ( select d_icd_diagnoses.icd9_code from d_icd_diagnoses where d_icd_diagnoses.short_title = 'ac posthemorrhag anemia' ) and strftime('%y',diagnoses_icd.charttime) <= '2104' ) as t1 join ( select admissions.subject_id, prescriptions.drug, prescriptions.startdate from prescriptions join admissions on prescriptions.hadm_id = admissions.hadm_id where admissions.subject_id in ( select patients.subject_id from patients where patients.gender = 'm' ) and admissions.age between 30 and 39 and strftime('%y',prescriptions.startdate) <= '2104' ) as t2 on t1.subject_id = t2.subject_id where t1.charttime < t2.startdate and datetime(t2.startdate) between datetime(t1.charttime) and datetime(t1.charttime,'+2 month') group by t2.drug ) as t3 where t3.c1 <= 5