program p1;
const mat:array[0..9,0..9] 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));
var n:string;
    x,t,i:integer;
    f1,f2:text;

BEGIN
 assign(f1,'cifra.in'); reset(f1);
 assign(f2,'cifra.out'); rewrite(f2);

  readln(f1,t);

  for i:=1 to t do
   begin
    readln(f1,n);
    if length(n)=1 then
                    writeln(f2,mat[0,ord(n[1])-ord('0')])
                   else
                    writeln(f2,mat[ord(n[length(n)-1])-ord('0'),ord(n[length(n)])-ord('0')]);
   end;
 close(f1); close(f2);
END.