#include <iostream>
#include <string>
#include <algorithm>
#include <cctype>
using namespace std;

struct rect {
  char c;
  int top, buttom, left, right;
  rect() : c(0), top(50), buttom(0), left(50), right(0) {}
};

int main()
{
  int N;
  cin >> N;
  for (int l = 0; l < N; l++) {
    int h, w;
    cin >> h >> w;

    string pic[50];
    rect r[7];

    for (int i = 0; i < h; i++) {
      cin >> pic[i];

      for (int j = 0; j < w; j++) {
	if (!isalpha(pic[i][j])) continue;

	for (int k = 0; k < 7; k++) {
	  if (!r[k].c) {
	    r[k].c = pic[i][j];
	    r[k].top = r[k].buttom = i;
	    r[k].left = r[k].right = j;
	    break;
	  }
	  else if (r[k].c == pic[i][j]) {
	    r[k].top = min(i, r[k].top);
	    r[k].buttom = max(i, r[k].buttom);
	    r[k].left = min(j, r[k].left);
	    r[k].right = max(j, r[k].right);
	    break;
	  }
	}
      }
    }

    for (int k = 0; r[k].c && k < 7; k++) {
      for (int i = r[k].top; i <= r[k].buttom; i++) {
	for (int j = r[k].left; j <= r[k].right; j++) {
	  if (pic[i][j] == '.') { goto sus; }
	}
      }
    }
    {
      bool checked[7] = {false};
      while(1) {
	bool flag[7] = {false};
	for (int k = 0; r[k].c && k < 7; k++) {
	  if (checked[k]) { continue; }
	  
	  flag[k] = true;
	  
	  for (int i = r[k].top; i <= r[k].buttom; i++) {
	    for (int j = r[k].left; j <= r[k].right; j++) {
	      if (r[k].c != pic[i][j] && pic[i][j] != '?') { flag[k] = false; }
	    }
	  }

	  if (flag[k]) {
	    checked[k] = true;
	    //   cout << r[k].c << endl << r[k].top << " " << r[k].buttom << " "<< r[k].left << " " << r[k].right << endl;
	    for (int i = r[k].top; i <= r[k].buttom; i++) {
	      for (int j = r[k].left; j <= r[k].right; j++) {
		pic[i][j] = '?';
	      }
	    }
	    break;
	  }
	}
	bool hoge = false;
	for (int k = 0; r[k].c && k < 7; k++) {
	  if (flag[k]) {
	    hoge = true;
	  }
	}
	if (!hoge) {
	  break;
	}
      }

      bool hogehoge = false;
      for (int k = 0; r[k].c && k < 7; k++) {
	if (!checked[k]) {
	  hogehoge = true;
	}
      }
      if (hogehoge) { goto sus; }
    }
    
    cout << "SAFE" << endl;
    continue;
  sus:
    cout << "SUSPICIOUS" << endl;
  }
  
  return 0;
}