#include <stdio.h>

int main()

{

int a, b, c, d, e, m;

scanf("%d", &a);

b = a % 10;

c = a /10%10 ;

d = a / 100 % 10;

e = a / 1000;

m = b * 1000 + c * 100 + d * 10 + e;

printf("%d\n", m);

return 0;

}