

int main(int argc, char* argv[])
{
  int n,m,a,b,c,s,p;
  scanf("%d",&n);
  if(n==10000)printf("00001");
  else 
	  if(n<=9)printf("%d",n);
	  else 
		  if(n>=10&&n<=99)
		  {m=n/10;
            a=n-m*10;
			printf("%d%d",a,m);}
          else
	    if(n>=100&&n<=999)
		{s=n/100;
	    m=(n-s*100)/10;
         b=n-s*100-m*10;
           printf("%d%d%d",b,m,s);}
  else 
	  if(n>=1000&&n<=9999)
	  {m=n/10;
     
	 
	 p=n/1000;
	 s=(n-p*1000)/100;
	 b=(n-s*100-p*1000)/10;
	 c=n-p*1000-s*100-10*b;
 
	 printf("%d%d%d%d",c,b,s,p);}
  return 0;



}