Problem in receiving the data from Bluetooth module

Using Arduino Programming Questions
59

test if the last 4 characters are 'D', 'O', 'N', and 'E'. If so, set ended to true.

After the "DONE" there is still a \r\n and an OK followed by another \r\n is present.

So should I still look out for "DONE" ?

If yes, I'm using

f(index < 199)
      {
        inData1[index] = inChar;
        for(int i=index ;i>=(index-3);i--)
        {
          if(inData1[i]=='E')
          {
            if(inData1[i-1]=='N')
            {
              if(inData1[i-2]=='O')
              {
                   if(inData1[i-3]=='D')
                     {
                        Serial.println("DETECTED");
                        break;
                      }
               }
            }
          }

to detect DONE. Is this feasible?