letter_collect_data_begin	id=0	letter_item_ids={1;2}	letter_collect_data_end
letter_collect_data_begin	id=1	letter_item_ids={3;4}	letter_collect_data_end
letter_collect_data_begin	id=2	letter_item_ids={5;6}	letter_collect_data_end
letter_collect_data_begin	id=3	letter_item_ids={7;8}	letter_collect_data_end
letter_collect_data_begin	id=4	letter_item_ids={9}	letter_collect_data_end