#include<iostream> #include<cstring> using namespace std; int main() { string s1; string s2; cin>>s1>>s2; if(s2.find(s1) != string::npos) { cout << s1 << " is substring of " << s2 << endl; } else if(s1.find(s2) != string::npos) { cout << s2 << " is substring of " << s1 << endl; } else { cout << "No substring" << endl; } return 0; }