int main() {
    string a, b;
    
    cin >> a >> b;
    
    cout << a.length() << " " << b.length() << endl;
    cout << a + b << endl;
    
    string a_(a), b_(b);
    
    a_[0] = b[0];
    b_[0] = a[0];
    
    cout << a_ << " " << b_ << endl;
    
    return 0;
}