private static bool isShield(Fingers f){
      int[] t={1,1,1,0,0}; 
     return f.checkFingers(t);
 }
 private static bool isCurse(Fingers f){
      int[] t={1,1,1,1,1}; // all fingers opened
     return f.checkFingers(t);
 }
 private static bool isThrow(Fingers f){
      int[] t={0,0,1,1,0}; 
     return f.checkFingers(t);
 }
 private static bool isBullet(Fingers f){
      int[] t={1,0,0,1,1}; 
     return f.checkFingers(t);
 }
 private static bool isNeutral(Fingers f){
     int[] t={0,0,0,0,0}; // all fingers hidden
     return f.checkFingers(t);
 }