var problems = [ 
                 "Blank",
                 [0, 0, 0, 0, 0, 0, 0, 0, 0,
                  0, 0, 0, 0, 0, 0, 0, 0, 0,
                  0, 0, 0, 0, 0, 0, 0, 0, 0,
                  0, 0, 0, 0, 0, 0, 0, 0, 0,
                  0, 0, 0, 0, 0, 0, 0, 0, 0,
                  0, 0, 0, 0, 0, 0, 0, 0, 0,
                  0, 0, 0, 0, 0, 0, 0, 0, 0,
                  0, 0, 0, 0, 0, 0, 0, 0, 0,
                  0, 0, 0, 0, 0, 0, 0, 0, 0],
                 "Basic",
				 [7, 9, 0, 2, 0, 0, 0, 0, 6, 
                  0, 0, 3, 4, 8, 6, 0, 0, 2, 
                  0, 8, 2, 0, 0, 5, 0, 1, 0,
                  0, 0, 1, 8, 2, 0, 0, 7, 0,
                  0, 0, 5, 0, 0, 0, 6, 0, 0,
                  0, 4, 0, 0, 6, 1, 3, 0, 0,
                  0, 4, 0, 6, 0, 0, 9, 3, 0,
                  5, 0, 0, 7, 1, 4, 2, 0, 0,
                  7, 0, 0, 0, 0, 9, 0, 5, 4],
                 "Harder", 
                 [0, 0, 0, 0, 0, 9, 0, 0, 0,
                  1, 3, 8, 0, 0, 0, 0, 0, 7,
                  0, 0, 0, 0, 4, 0, 0, 0, 0,
                  6, 0, 4, 0, 0, 3, 0, 0, 0,
                  0, 0, 0, 0, 5, 0, 0, 0, 0,
                  0, 0, 0, 2, 0, 0, 7, 0, 8,
                  0, 0, 0, 0, 7, 0, 0, 0, 0,
                  6, 0, 0, 0, 0, 0, 9, 4, 3,
                  0, 0, 0, 1, 0, 0, 0, 0, 0] ];