fill in the blanks, the question cadres are divided into uncertain blanks, which are determined by parentheses, and the left and right parentheses are translated as! =!. Then this blank needs to pass a key value to the background to facilitate the storage of the answer under the parentheses.
for example: how abcd () efgh () ijkl () mn () becomes abcd (- sharp1) efgh (- sharp2) ijkl (- sharp3) mn (- sharp4)
an index needs to be added to the parentheses