Graduate students and undergraduate students who are taking CS 410 for master credit will need to add an additional feature to their program to identify the defective part(s) of the 9x9 grid. It should work like this: hb117@uxb5:"/class/cs410/p2$ gcc -Wall -o sodoku sodoku.c -pthread hb117@uxb5:"/class/cs410/p2$ ./sodoku 123465689 456789213 789123457 214376598 367958124 598214637 641832975 875691342 932547861 1234 6 5 6 8 9 456789213 789123457 214376598 367958124 598214637 641832975 875691342 932547861 No Row 1, 3 Column 7, 9 Grid 3