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    public static String encryption(String s) { StringBuilder result = new StringBuilder(); s = s.replaceAll("\s", ""); int n = s.length(); int row = (int) Math.sqrt(n); int column = (row * row == n) ? row : row + 1; for (int i = 0; i < column; i++) { for (int j = i; j < n; j += column) { result.append(s.charAt(j)); } result.append(" ");

        }
    
        return result.toString();
    
    }