if(defined($afile)) { &parse_recent; &parse_monthly; &parse_new; &create_temp_a; &copy_new_to_recent; &copy_recent_to_monthly; &remove_excess; &done; }
if(defined($bfile)) { &parse_recent; &parse_monthly; &parse_new; &create_temp_b; &copy_new_to_recent; &copy_recent_to_monthly; &remove_excess; &done; }
if(defined($cfile)) { &parse_recent; &parse_monthly; &parse_new; &create_temp_c; &copy_new_to_recent; &copy_recent_to_monthly; &remove_excess; &done; }
if(defined($dfile)) { &parse_recent; &parse_monthly; &parse_new; &create_temp_d; &copy_new_to_recent; &copy_recent_to_monthly; &remove_excess; &done; }