Using DCDL to write a program that replaces a * b by a ­ b and a**b by a ¯

b, where a and b are any characters other than *. For example, if a 1

a 2 * a 3 * *a 4 ***a 5

is the input string then a

1 a

2 ­ a 3 ¯ a 4 *** a 5

will be the output string.