#include <iostream> #include <cstdio> using namespace std; int main() { int a,b,c,d,e,f; cin>>a; b=a/10000; c=a/1000-b*10; d=a/100-b*100-c*10; e=a/10-b*1000-c*100-d*10; f=a%10; cout<<f<<e<<d<<c<<b; return 0; }