#include <string>
#include <iostream>

using namespace std;


class Table{
private :
  static const int KNOWN    = 0;
  static const int UNKNOWN  = 1;
  static const int ANSWERED = 2;
  int size_x,size_y;
  long cell[100][10];
  char flag[100][10];
public :
  void Load(int sx,int sy);
  void FillTable();
  void PrintAnswer();
};

void Table::Load(int sx,int sy){
  string str;
  int x,y;
  size_x = sx+1;
  size_y = sy+1;
  for(y=0;y<size_y;y++){
    for(x=0;x<size_x;x++){
      cin >> str;
      if(str == "?"){
	cell[y][x] = 0;
	flag[y][x] = UNKNOWN;
      }else{
	cell[y][x] = atol(str.c_str());
	flag[y][x] = KNOWN;
      }
    }
  }
}

void Table::FillTable(){
  bool edit_flag;
  int count;
  int tmp,trg;
  do{
    edit_flag = false;
    for(int x=0;x<size_x;x++){
      count=0;
      for(int y=0;y<size_y;y++){
	if(flag[y][x]==UNKNOWN) count++;
      }
      if(count == 1){
	tmp = 0;
	trg = -1;
	for(int y=0;y<size_y-1;y++){
	  if(flag[y][x]==UNKNOWN){
	    trg = y;
	  }else{
	    tmp += cell[y][x];
	  }
	}
	if(trg == -1){
	  cell[size_y-1][x] = tmp;
	  flag[size_y-1][x] = ANSWERED;
	}else{
	  cell[trg][x] = cell[size_y-1][x]-tmp;
	  flag[trg][x] = ANSWERED;
	}
	edit_flag = true;
      }
    }
    for(int y=0;y<size_y;y++){
      count=0;
      for(int x=0;x<size_x;x++){
	if(flag[y][x]==UNKNOWN) count++;
      }
      if(count == 1){
	tmp = 0;
	trg = -1;
	for(int x=0;x<size_x-1;x++){
	  if(flag[y][x]==UNKNOWN){
	    trg = x;
	  }else{
	    tmp += cell[y][x];
	  }
	}
	if(trg == -1){
	  cell[y][size_x-1] = tmp;
	  flag[y][size_x-1] = ANSWERED;
	}else{
	  cell[y][trg] = cell[y][size_x-1]-tmp;
	  flag[y][trg] = ANSWERED;
	}
	edit_flag = true;
      }
    }
    
  }while(edit_flag);
}
void Table::PrintAnswer(){
  bool ng_flag = false;
  for(int y=0;y<size_y;y++){
    for(int x=0;x<size_x;x++){
      if(flag[y][x]==UNKNOWN) ng_flag = true;
    }
  }
  if(ng_flag){
    cout << "NO" << endl;
    return;
  }
  for(int y=0;y<size_y;y++){
    for(int x=0;x<size_x;x++){
      if(flag[y][x]==ANSWERED){
	cout << cell[y][x] << endl;
      }
    }
  }
}
int main(void){
  Table t;
  int x,y;
  bool first_flag = true;  
  while(true){
    cin >> y;
    if(y==0) break;
    cin >> x;
    if(first_flag){
      first_flag = false;
    }else{
      cout << endl;
    }
    t.Load(x,y);
    t.FillTable();
    t.PrintAnswer();
  }
  return 0;
}