#include<bits/stdc++.h> using namespace std; int main(){ int q=0,b=0,s=0,g=0,a; cin>>a; g=a%10; s=(a/10)%10; b=(a/100)%10; q=a/1000; cout<<g<<q<<b<<s<<endl;//g*1000+s+b*10+q*100<<endl; return 0; }