void main()
{
	int n,a,b,c,d,e,m;
	scanf("%d",&n);
	if(n<10)
		printf("%d\n",n);
	else
	{
		if(n<100)
		{
		a=n/10;
		b=n%10;
	    m=a+b*10;
		printf("%d\n",m);
		}
		else
		{
			if(n<1000)
			{
		    a=n/100;
	  	    b=n/10-a*10;
		    c=n%10;
		    m=a+b*10+c*100;
		    printf("%d\n",m);
			}
			else
			{
				if(n<10000)
				{
					a=n/1000;
					b=n/100-a*10;
					c=n/10-a*100-b*10;
					d=n%10;
					m=a+b*10+c*100+d*1000;
					printf("%d\n",m);
				}
				else
				{
					a=n/10000;
					b=n/1000-a*10;
					c=n/100-a*100-b*10;
					d=n/10-a*1000-b*100-c*10;
					e=n%10;
                    m=a+b*10+c*100+d*1000+e*10000;
					printf("%d\n",m);
				}
			}
		}
	}
}