Given the five lines of data:

$1,,$"HELLO",$7$

$2,4,$TEXT,$8$

$9,,,6$

$21,31,$SHORT

$100,200,$"LAST LINE",$999$

Write a SAS DATA step to read these data, assigning the four data values to the variables X$,$ Y$,$ C and Z$.$ Variable C should be a character variable. $($Note that the value of variable C in the last line is nine characters.$)$ The double quotes should be stripped off the text strings and two adjacent commas should be interpreted as containing a missing value. Careful, line four has only three values on it$.$ Remember the INFILE option to handle short lines.