import std.array, std.stdio, std.string, std.algorithm, std.conv;


void main()
{
    long N = readln.strip.to!long;
    long M = readln.strip.to!long;
    int tmp = N % 10;
    foreach (i; 1..M) {
        tmp *= N;
        tmp %= 10;
    }
    writeln(tmp);
}