#include <string>
#include <iostream>

using namespace std;

int main()
{
    string user;
    cout << "-> ";
    cin >> user;
    string a, b;
    if (size_t pos = user.find('_'); pos != user.npos)
    {
        a = user.substr(0,pos);
        b = user.substr(pos+1);

        cout << a << "\n" << b;
    }
    else
    {
        cout << "No _ in input\n";
    }
}