#include<iostream> // cin\cout\endl #include<cstdio> //scanf()\printf() using namespace std; int main(){ int g,s,b,q,e; cin>>e; g=e%10; s=e/10%10; b=e/100%10; q=e/1000; cout<<g*10+s+b*1000+q*100; return 0; }