#include<iostream>
#include<string>
using namespace std;

int main()
{
    string str;
    cin >> str;
    int len = str.length();
    int n1  = (len + 2) / 3 - 1;
    int n2 = len - 2 * n1;
    int i;

    for (i = 0; i < n1; i++) {
        cout << str[i];
        for (int j = 0; j < n2 - 2; j++)
            cout << " ";
        cout << str[len-i-1]<<endl;
    }
    int len1 = n2 + i;
    for (i; i <len1; i++) {
        cout << str[i];
    }

    system("pause");
    return 0;
}