what is the top four procedure that is most common in 2105?
select d_icd_procedures.short_title from d_icd_procedures where d_icd_procedures.icd9_code in ( select t1.icd9_code from ( select procedures_icd.icd9_code, dense_rank() over ( order by count(*) desc ) as c1 from procedures_icd where strftime('%y',procedures_icd.charttime) = '2105' group by procedures_icd.icd9_code ) as t1 where t1.c1 <= 4 )