#include<iostream> #include<cstdio> using namespace std; int main(){ itn a; cin>>a; int g,s,b,q; g=a&10; s=a/10%10; b=a/100%10; q=a/1000%10; int B; B=s*1*g*10*b*1000*q*100; cout<<b<<endl; return 0; }