#include <stdio.h>
//bow to me you little garbage!!!!!!!!suckers
int main() {
  int a;
  scanf("%d",&a);
  int b,c,d,e;
  b=a%10;
  c=a/10%10;
  d=a/100%10;
  e=a/1000%10;
  printf("%d%d%d%d",b,c,d,e);
    return 0;
}