#include <fstream>
#include <iostream>
#define M 1999999973
using namespace std;
ifstream f("lgput.in"); ofstream g("lgput.out");
int F(int a, int b)
{   int c=1;
    while(b>0)
    {   if(b%2==1) c=(c*a)%10;
        a=(a*a)%10;
        b/=2;
    }
    return c;
}
int main()
{   int a,b;
    cin>>a>>b;
    cout<<F(a,b);
    return 0;
}






/*int main()
{   int a,b;
    f>>a>>b;
    int r=1;
    for(;b;b>>=1)
    {   if(b&1) r=(1LL*r*a)%M;
        a=(1LL*a*a)%M;
    }
    g<<r;
    g.close(); f.close();
    return 0;
}


int lgput(int a, int b)
{   if(b==0) return 1;
    int r=lgput(a,b/2);
    r=(1LL*r*r)%M;
    if(b&1) r=(1LL*r*a)%M;
    return r;
}
int main()
{   int a,b;
    f>>a>>b;
    g<<lgput(a,b);
    g.close(); f.close();
    return 0;
}
*/