1 import java.util.*; 2 import java.io.*; 3  4 class FastReader{ 5     BufferedReader reader; 6     StringTokenizer tokenizer; 7      8     public FastReader(InputStream stream){ 9         reader = new BufferedReader(new InputStreamReader(stream), 1 << 10);10         tokenizer = null;11     }12     13     public String next(){14         while (tokenizer == null || !tokenizer.hasMoreTokens()){15             try{16                 tokenizer = new StringTokenizer(reader.readLine());17             } catch (Exception e){18                 throw new RuntimeException(e);19             }20         }21         22         return tokenizer.nextToken();23     }24     25     public long next_long(){26         return Long.parseLong(next());27     }28     29     public int next_int(){30         return Integer.parseInt(next());31     }32 }33 34 public class Main {35     public static void main(String[] args){36         FastReader reader = new FastReader(System.in);37         String process_str = reader.next();38         39         int size = process_str.length() + 2;40         int n1, n2, n3;41         42         n1 = n3 = size / 3;43         n2 = n1 + size % 3;44         size -= 2;45         46         StringBuilder white_space = new StringBuilder();47         for (int i = 0; i < n2 - 2; i++)48             white_space.append(‘ ‘);49         50         for (int i = 0; i < n1 - 1; i++)51             System.out.println(process_str.charAt(i) + white_space.toString() + process_str.charAt(size - i - 1));52         for (int i = n1 - 1; i <= size - n1; i++)53             System.out.print(process_str.charAt(i));54         System.out.println();55     }56 }