public static boolean chkRow(char[] arr){
		Set<Character> set = new HashSet<>();
		boolean res = true;
		for(int i=0;i<arr.length;i++){
			if(arr[i]!='.') {
				if (set.contains(arr[i])) {
					if(log) {
						prints(set);
						System.out.println(arr[i]);
					}
					res = false;
					break;
				} else {
					set.add(arr[i]);
				}
			}
		}
		return res;
	}