#include <stdio.h>

static void solve(int size_x, int size_y, int number_table[10][100], int known_table[10][100], int number_of_unknowns);

int main()
{
#ifdef TARGET_RT_MAC_CFM
	FILE *stream = fopen("input", "r");
#else
	FILE *stream = stdin;
#endif
	int is_first = 1;
	int size_x, size_y, x, y, number_of_unknowns;
	int number_table[10][100], known_table[10][100];
	for (;;) {
		fscanf(stream, "%d", &size_y);
		if (size_y <= 0)
			break;
		fscanf(stream, "%d", &size_x);
		size_x++, size_y++;
		number_of_unknowns = 0;
		for (y = 0; y < size_y; y++) {
			for (x = 0; x < size_x; x++) {
				if (fscanf(stream, "%d", &number_table[x][y]) == 1)
					known_table[x][y] = 1;
				else {
					fscanf(stream, " %*c");
					known_table[x][y] = 0;
					number_of_unknowns++;
				}
			}
		}
		if (!is_first)
			printf("\n");
		is_first = 0;
		solve(size_x, size_y, number_table, known_table, number_of_unknowns);
	}
	return 0;
}

static void solve(int size_x, int size_y, int number_table[10][100], int known_table[10][100], int number_of_unknowns)
{
	int  done = 0, x, y, unknown_index;
	long known_sum;
	while (!done) {
		done = 1;
		for (x = 0; x < size_x - 1; x++) {
			unknown_index = -1, known_sum = 0;
			for (y = 0; y < size_y - 1; y++) {
				if (known_table[x][y])
					known_sum += number_table[x][y];
				else {
					if (unknown_index != -1) {
						unknown_index = -1;
						break;
					}
					unknown_index = y;
				}
			}
			if (unknown_index != -1) {
				number_table[x][unknown_index] = number_table[x][size_y - 1] - known_sum;
				known_table[x][unknown_index] = 2;
				number_of_unknowns--;
				done = 0;
			}
		}
		if (number_of_unknowns <= 0)
			break;
		for (y = 0; y < size_y - 1; y++) {
			unknown_index = -1, known_sum = 0;
			for (x = 0; x < size_x - 1; x++) {
				if (known_table[x][y])
					known_sum += number_table[x][y];
				else {
					if (unknown_index != -1) {
						unknown_index = -1;
						break;
					}
					unknown_index = x;
				}
			}
			if (unknown_index != -1) {
				number_table[unknown_index][y] = number_table[size_x - 1][y] - known_sum;
				known_table[unknown_index][y] = 2;
				number_of_unknowns--;
				done = 0;
			}
		}
		if (number_of_unknowns <= 0)
			break;
	} // while (!done)
	
	if (number_of_unknowns > 0)
		printf("NO\n");
	else {
		for (y = 0; y < size_y - 1; y++) {
			for (x = 0; x < size_x - 1; x++) {
				if (known_table[x][y] == 2)
					printf("%d\n", number_table[x][y]);
			}
		}
	}
} // solve