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