#include <iostream>
#include <set>

using namespace std;

int main()
{
  int loop;
  cin >> loop;
  int h, w;
  while (loop-- && cin >> h >> w){
    //cerr << h << " " << w << endl;
    char table[64][64];
    set<char> letter;
    for (int y = 0; y != h; ++y){
      for (int x = 0; x != w; ++x){
	char c;
	cin >> c;
	table[x][y] = c;
	letter.insert(c);
      }
    }
    letter.erase('.');
    /*
    for (set<char>::iterator it = letter.begin();
	 it != letter.end(); ++it){
      cerr << *it;
    }
    cerr << endl;
    */
    bool safe = true;
    while (!letter.empty() && safe){
      safe = false;
      for (set<char>::iterator it = letter.begin();
	   it != letter.end() && !safe; ++it){
	char c = *it;
	int min_x = 100;
	int min_y = 100;
	int max_x = -100;
	int max_y = -100;
	for (int y = 0; y != h; ++y){
	  for (int x = 0; x != w; ++x){
	    if (c == table[x][y]){
	      min_x = min(min_x, x);
	      min_y = min(min_y, y);
	      max_x = max(max_x, x);
	      max_y = max(max_y, y);
	    }
	  }
	}
	safe = true;
	for (int y = min_y; y <= max_y && safe; ++y){
	  for (int x = min_x; x <= max_x && safe; ++x){
	    safe = (table[x][y] == c || table[x][y] == '\0');
	  }
	}
	
	//cerr << c << " " << safe << endl;

	if (safe){
	  for (int y = min_y; y <= max_y && safe; ++y){
	    for (int x = min_x; x <= max_x && safe; ++x){
	      table[x][y] = '\0';
	    }
	  }
	  letter.erase(c);
	  break;
	}
      }
    }
    
    if (safe){
      cout << "SAFE" << endl;
    } else {
      cout << "SUSPICIOUS" << endl;
    }
    
    
  }
  
}