/* Kristoffer Hansen. arnsfelt@daimi.au.dk */

#include <iostream>
#include <string>
#include <set>

int main()
{
  int N;

  set<string> prev,cur;
  set<string>::const_iterator sI;

  string s;
  string::size_type i;

  cin >> N;
  while (N-->0) {
    cin >> s;
    cur.clear();
    cur.insert("");

    for (i=0; i<s.length(); i++) {
      prev = cur;
      cur.clear();

      for (sI=prev.begin(); sI!=prev.end(); sI++) {
	if (sI->length()>0 && (*sI)[0]==s[i])
	  cur.insert(sI->substr(1));
	if (sI->length()<10)
	  cur.insert(*sI+s[i]);
      }
    }
    
    if (cur.find("")!=cur.end())
      cout << "An echo string with buffer size ten\n";
    else if (cur.size()!=0)
      cout << "Not an echo string, but still consistent with the theory\n";
    else
      cout << "Not consistent with the theory\n";
  }
  return 0;
}