4 children want to buy movie tickets for the four adjacent seats in the last row. If there are 26 seats in the last row, and the tickets for seats 8 to 19 have been sold, how can they buy tickets for this row? How many kinds.
4个小朋友想买最后一排的相邻四个座位的电影票，若最后一排有26个座位，且第8至19号座位的票已经卖出，则他们买这一排票的方法有多少种．
<result>4</result>