public int playRPS(int PlayerOneChoice, int PlayerTwoChoice, String playerNameOne, String playerNameTwo) {
		int res=winnerIs(PlayerOneChoice,PlayerTwoChoice); // also validates the inputs, invalid gives -1
		if (res==0) 
			System.out.println("It's a tie!");
		else if(res==1) {
			System.out.println(weaponNameFromIndexCapitalized[PlayerOneChoice]+" "+ winningMove[PlayerOneChoice]+" "+  weaponNameFromIndex[PlayerTwoChoice]+".");
			if(playerNameOne.equals("You")) System.out.println(playerNameOne+ " win!!");//grammar matters...
			else System.out.println(playerNameOne+ " wins!!");
		}
		else if(res==2) {
			System.out.println(weaponNameFromIndexCapitalized[PlayerTwoChoice]+" "+ winningMove[PlayerTwoChoice]+" "+  weaponNameFromIndex[PlayerOneChoice]+".");
			System.out.println(playerNameTwo+ " wins!!");
		}
		else {
			System.err.println("playRPS got -1 back from winnerIs("+PlayerOneChoice+","+PlayerTwoChoice+")");
			return -1;
		}
		System.out.println("");
		return res;
	}