1     #include <iostream>
 2     #include <cstdio>
 3     #include <cstring>
 4     using namespace std;
 5 
 6     int main()
 7     {
 8         int a,b,ans[4];
 9         while(~scanf("%d %d",&a,&b))
10         {
11             a%=10;
12             ans[1]=a;
13             ans[2]=a*a%10;
14             ans[3]=a*a*a%10;
15             ans[0]=a*a*a*a%10;
16             b%=4;
17             printf("%d\n",ans[b]);
18         }
19         return 0;
20     }