#include <stdio.h>
int isprime(long int p) {
long int i=3,k,db=0;
if(p>=20000){k=10000;
}else{k=p/2;}
for(i=3;i<=k;i=i+2){
if(p%i==0){db++;}}
if (db==0) {return 1; }else {
return 0;}}
int main(){
FILE *be,*ki;
be=fopen("be.txt","r");
ki=fopen("ki.txt","w");
long int x,y=0,i;
fscanf(be,"%ld",&x);
if (x==1) {fprintf(ki,"0\n");}
else {if (isprime(x)) {
fprintf(ki,"%ld\n",x); }
else {if (isprime(x-2)) {
fprintf(ki,"2+%ld\n",x-2); }
else { if (isprime(x-4)) {
fprintf(ki,"2+2+%ld\n",x-4);}
else {i=1; while (y==0) {
i=i+2;if(isprime(i) && isprime(x-3-i)) {y=i;}}
fprintf(ki,"3+%ld+%ld\n",y,x-3-y);}}}}
return 0;fclose(be);fclose(ki);}