#include <stdio.h>

int main(){
	int h,s,d,j;
	int b=1942;
	h = b/1000;
	s = (b/100)%10;
	d = (b/10)%10;
	j = b%10;
	b = j*1000+d*100+s*10+h;
	printf("%d\n",b);
	return 0;
}