#include <iostream>
#include <set>

using namespace std;

int cnt[26];
int table[26][26];

void topo(int k) {
  if(cnt[k] != 0) return;
  --cnt[k];
  for(int i = 0; i < 26; ++i) {
    if(table[k][i]) {
      --cnt[i];
      topo(i);
    }
  }
}

bool check() {
  memset(cnt, 0, sizeof(cnt));
  for (int i = 0; i < 26; ++i)
    for (int j = 0; j < 26; ++j){
      if (table[i][j])
	++cnt[j];
    }
      
  for(int i = 0; i < 26; ++i) {
    topo(i);
  }
  for(int i = 0; i < 26; ++i) {
    if(cnt[i] > 0)
      return false;
  }
  return true;
}

int h, w;
char input[50][50];

int main() {
  int n_cases;
  cin >> n_cases;
  while(n_cases--){
    cin >> h >> w;
    set<char> materials;

    memset(table, 0, sizeof(table));

    for(int y = 0; y < h; ++y)
      for(int x = 0; x < w; ++x){
	cin >> input[x][y];
	if (input[x][y] != '.')
	  materials.insert(input[x][y]);
      }

    int min_x[26];
    int max_x[26];
    int min_y[26];
    int max_y[26];
    for (int i = 0; i < 26; ++i){
      min_x[i] = 100;
      max_x[i] = -1;
      min_y[i] = 100;
      max_y[i] = -1;
    }
    
    for (int x = 0; x < w; ++x){
      for (int y = 0; y < h; ++y){
	if (input[x][y] == '.')continue;
	int i = input[x][y] - 'A';
	min_x[i] = min(min_x[i], x);
	min_y[i] = min(min_y[i], y);
	max_x[i] = max(max_x[i], x);
	max_y[i] = max(max_y[i], y);
      }
    }

    bool ok = true;
    
    for (set<char>::iterator it = materials.begin(); it != materials.end() and ok; ++it){
      char i = *it - 'A';
      for (int x = min_x[i]; x <= max_x[i] and ok; ++x){
	for (int y = min_y[i]; y <= max_y[i] and ok; ++y){
	  if (input[x][y] == '.'){
	    ok = false;
	    break;
	  }
	  char j = input[x][y] - 'A';
	  if (i != j){
	    table[j][i] = 1;
	  }
	}
      }
    }
    /*
    for (int i = 0; i < 26; ++i){
      cout << min_x[i] << "," << max_x[i] << "," << min_y[i] << "," << max_y[i] << endl;
    }
    cout << ok << endl;
    for (int i = 0; i < 26; ++i){
      for (int j = 0; j < 26; ++j){
	if (j != 0) cout << " ";
	cout << table[i][j];
      }
      cout << endl;
    }
    */
    if(ok && check()) {
      cout << "SAFE" << endl;
    } else {
      cout << "SUSPICIOUS" << endl;
    }
  }
}