#include <iostream>
#include <string>

using namespace std;


void writeForwards(string str, int size){
     if( size < str.length() ){
            cout << str[ size ] << endl;
            writeForwards(str, size+1);
     }
}

int main(){
    string str;
    cout << "Enter a string :> ";
    cin >> str;
    writeForwards(str, 0);

    return 0;
}