#include <stdio.H>

#include <math.h>

int prime(int m)

{

int i,n;

if(m==1)return 0;

n=(int)sqrt((double)m);

for(i=2;i<=n;i++)

if(m%i==0)return 0;

return 1;

}

void main()

{

int count,i,number;

count=0;

for(number=6;number<=20;number=number+2)

{

for(i=3;i<=number/2;i=i+2)

if(prime(i)&&prime(number-i))

{

printf("%d=%d+%d ",number,i,number-i);

count++;

if( count%5==0 )printf("\n");

continue;

}

}

}