Untitled

#include <iostream>
using namespace std;

int main()
{
    string a, b;
    cin >> a >> b;

    if (a.length() > b.length())
    {
        for (int i = 0; b.length()> i; i++)
        {
            a[i] = b[i];
        }
        cout << a<< endl;
    }
    if (a.length() < b.length())
    {
        for (int i = 0; a.length()> i; i++)
        {
            b[i] = a[i];
        }
        cout << b << endl;
    }
    if (a.length() == b.length())
    {
        cout << a << b << endl;
    }
}