#include<iostream> #include<cstdio> using namespace std; int main() { int a; scanf("%d", &a); int g = a%10; int s = a/10%10; int d = a/10/10%10; int q = a/10/10/10%10; int f = a/10/10/10/10%10; cout <<q<<g<<s<<d; return 0; }