public static boolean checkLine(int line, char ch){
		int T = 0, num = 0;
		for(int i = 0; i < 4; i++){
			if(board[line].charAt(i) == 'T') T++;
			else if(board[line].charAt(i) == ch) num++;
		}
		if(T == 0 && num == 4) return true;
		if(T == 1 && num == 3) return true;
		return false;
	}