A pen exam, ask for a good algorithm

For more information, see Linux programming and kernel. Input expression. the expression is represented by a match, and only one match is moved to make the expression true. for example, enter "3 + 6 = 3 ", after moving a match, it becomes "9-6 = 3 ".
Please use the program to implement the above process, first enter an expression, and then judge whether the expression can be set up after moving a match. The value range of all numbers in the expression is: 0 ~ 9 (no negative number) it is difficult to draw a number using matches. number 1 is a vertical match, and number 2 is composed of five matches.