var n:string[100];
    f,g:text;   
    ok:boolean;
    a,b:array[1..100]of longint;
    e,c,i,lg,l:longint;
    x,r,y,m,q:longint;
    op:array[1..99]of byte=(0,1,5,2,8,3,9,2,8,7,7,8,4,7,3,8,4,1,5,4,4,5
                    ,9,6,2,7,3,6,2,1,1,2,8,1,7,2,8,5,9,8,8,9,3,0,6,1,7,0
                    ,6,5,5,6,2,5,1,6,2,9,3,2,2,3,7,4,0,5,1,4,0,9,9,0,6,9
                    ,5,0,6,3,7,6,6,7,1,8,4,9,5,8,4,3,3,4,0,3,9,4,0,7,1,0);
begin
assign(f,'cifra.in');reset(f);
assign(g,'cifra.out');rewrite(g);
ok:=false;
readln(f,x);   
for i:=1 to x do  
begin  
if ok=false then begin  
for l:=2 to 99 do  
begin
c:=l mod 10;
e:=l mod 4;
if e=0 then e:=4;   
m:=1;   
for y:=1 to e do  
m:=m*c;   
a[l]:=m mod 10;   
b[l]:=(b[l-1]+a[l])mod 10;
end;
end;
ok:=true;
readln(f,n);
m:=0;
lg:=length(n);
q:=ord(n[lg])-ord('0');
a[1]:=1;
b[1]:=1;
if lg>1 then m:=ord(n[lg-1])-ord('0');
r:=m*10+q;
writeln(g,op[r]);
end;
close(f);
close(g);
end.