#include <stdio.h>

int main(){
	unsigned n,j,d,s,h;
	int p,r,z,o;

	scanf("%u",&n);

	if(n<1000 || n>9999){
		printf("Nekorektan unos.\n");
		return 1;
	}

	j=n%10;
	d=(n/10)%10;
	s=(n/100)%10;
	h=n/1000;
	
	p=j*d*s*h;
	r=j+h-s-d;
	z=j+d+s+h;
	o=j*1000+d*100+s*10+h;

	printf("a) %d\nb) %d\nc) %d\nd) %d\n",p,r,z,o);

	return 0;
}