public void Run() {

		int Grid [][] = {
			{8,02,22,97,38,15,00,40,00,75,04,05,07,78,52,12,50,77,91,8},
			{49,49,99,40,17,81,18,57,60,87,17,40,98,43,69,48,04,56,62,00},
			{81,49,31,73,55,79,14,29,93,71,40,67,53,88,30,03,49,13,36,65},
			{52,70,95,23,04,60,11,42,69,24,68,56,01,32,56,71,37,02,36,91},
			{22,31,16,71,51,67,63,89,41,92,36,54,22,40,40,28,66,33,13,80},
			{24,47,32,60,99,03,45,02,44,75,33,53,78,36,84,20,35,17,12,50},
			{32,98,81,28,64,23,67,10,26,38,40,67,59,54,70,66,18,38,64,70},
			{67,26,20,68,02,62,12,20,95,63,94,39,63,8,40,91,66,49,94,21},
			{24,55,58,05,66,73,99,26,97,17,78,78,96,83,14,88,34,89,63,72},
			{21,36,23,9,75,00,76,44,20,45,35,14,00,61,33,97,34,31,33,95},
			{78,17,53,28,22,75,31,67,15,94,03,80,04,62,16,14,9,53,56,92},
			{16,39,05,42,96,35,31,47,55,58,88,24,00,17,54,24,36,29,85,57},
			{86,56,00,48,35,71,89,07,05,44,44,37,44,60,21,58,51,54,17,58},
			{19,80,81,68,05,94,47,69,28,73,92,13,86,52,17,77,04,89,55,40},
			{04,52,8,83,97,35,99,16,07,97,57,32,16,26,26,79,33,27,98,66},
			{88,36,68,87,57,62,20,72,03,46,33,67,46,55,12,32,63,93,53,69},
			{04,42,16,73,38,25,39,11,24,94,72,18,8,46,29,32,40,62,76,36},
			{20,69,36,41,72,30,23,88,34,62,99,69,82,67,59,85,74,04,36,16},
			{20,73,35,29,78,31,90,01,74,31,49,71,48,86,81,16,23,57,05,54},
			{01,70,54,71,83,51,54,69,16,92,33,48,61,43,52,01,89,19,67,48}
		};

		// visit every cell, calculate product of down, right, and diag down left & down right
		int length = 20;
		int max = 0;

		for (int r = 0; r < length; ++r)
		{
			for (int c = 0; c < length; ++c)
			{
				// Right
				if (c <= 16)
				{
					max = Math.max(max, Grid[r][c] * Grid[r][c+1] * Grid[r][c+2] * Grid[r][c+3]);
				} 
				// Down
				if (r <= 16)
				{
					max = Math.max(max, Grid[r][c] * Grid[r+1][c] * Grid[r+2][c] * Grid[r+3][c]);
				} 
				// Down-Right
				if (r <= 16 && c <= 16)
				{
					max = Math.max(max, Grid[r][c] * Grid[r+1][c+1] * Grid[r+2][c+2] * Grid[r+3][c+3]);
				}
				// Down-Left
				if (r <= 16 && c >= 3)
				{
					max = Math.max(max, Grid[r][c] * Grid[r+1][c-1] * Grid[r+2][c-2] * Grid[r+3][c-3]);
				}
			}
		}
		System.out.println(max);
	}