include

include

include

using namespace std;

string encryption(string s) { string noSpaces = ""; for (char c : s) { if (c != ' ') noSpaces += c; }

int L = noSpaces.length();
int rows = floor(sqrt(L));
int cols = ceil(sqrt(L));

if (rows * cols < L) rows++;

string result = "";
for (int c = 0; c < cols; c++) {
    if (c > 0) result += " ";
    for (int r = 0; r < rows; r++) {
        int idx = r * cols + c;
        if (idx < L) {
            result += noSpaces[idx];
        }
    }
}

return result;

}

int main() { string s; getline(cin, s); cout << encryption(s) << endl; return 0; }