public class count {
public static void main(String[] args)
{
//AB * CD = BA * DC
int[] AB = new int[81];
int[] CD = new int[81];
int i = 0;
for(int a = 1; a <= 9; a++)
for(int b = 1; b <= 9; b++)
{
AB[i++] = a * 10 + b;
}
CD = AB;
for(int a: AB)
{
int m = a % 10 * 10 + a / 10;
for(int b = 0; b < CD.length; b++)
{
int n = CD[b] % 10 * 10 + CD[b] / 10;
if(a * CD[b] == m * n && a != m && a != n)
System.out.println(a + "*" + CD[b] + "==" + m + "*" + n );
}
}
}