import std.algorithm, std.array, std.container, std.range;
import std.numeric, std.math, std.bigint, std.bitmanip, std.random;
import std.string, std.conv, std.stdio, std.typecons;

const auto a = [[0, 0, 0, 0],
                [1, 1, 1, 1],
                [2, 4, 8, 6],
                [3, 9, 7, 1],
                [4, 6, 4, 6],
                [5, 5, 5, 5],
                [6, 6, 6, 6],
                [7, 9, 3, 1],
                [8, 4, 2, 6],
                [9, 1, 9, 1]];

void main()
{
  auto n = readln.chomp[$-1..$].to!int;
  auto m = readln.chomp[$-2..$].to!int;
  writeln(a[n][(m + 3) % 4]);
}