#include<stdio.h>
int main()
{
   int a,b;
   scanf("%d",&a);
   int qian=a/1000;
   int bai=a%1000/100;
   int shi=a%1000%100/10;
   int ge=a%10;
   b=ge*1000+shi*100+bai*10+qian;
   printf("%d",b);
   return 0;
}