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


void main()
{
    long N = readln.strip.to!long % 10;
    long M = readln.strip.to!long;

    if (M == 0) writeln(1);
    else {
        writeln(N ^^ (M % 4) % 10);
    }
}