function getSurprise(strength) {
                      if(strength > 9)      return surprise_10;
                      else if(strength > 8) return surprise_09;
                      else if(strength > 7) return surprise_08;
                      else if(strength > 6) return surprise_07;
                      else if(strength > 5) return surprise_06;
                      else if(strength > 4) return surprise_05;
                      else if(strength > 3) return surprise_04;
                      else if(strength > 2) return surprise_03;
                      else if(strength > 1) return surprise_02;
                      else                  return surprise_01;
                  }