#include <iostream>
#include <string>

int main()
{
std::string b = "", s = "13 1 1";

for( int i = 0; i <= s.length(); i++ )
{
    if( s[ i ] == ' ' || i == s.length() )
    {
        std::cout << "->" << b << "<-" << '\n';
        b = "";
    }
    else
         b += s[ i ];
    
}
}