#include <iostream>
#include <conio.h>
using namespace std;

int main()

{

int i;

for (i=0; i<=40; i+=20)
{
for (i=5; i<=45; i+=20)
{
for (i=10; i<=50; i+=20)
{
for (i=15; i<=55; i+=20)
}
}
cout << i << "|" << endl;
}


getch();

}