const  a:array[0..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);

var  i,t,e,nr:integer;
n,s:string;
f,g:text;
begin
assign(f,'cifra.in'); reset(f);
assign(g,'cifra.out'); rewrite(g);
readln(f,t);
for i:=1 to t do begin
        readln(f,n);
        s:=copy(n,length(n)-1,2);
        val(s,nr,e);
        writeln(g,a[nr]);
end;
close(f);
close(g);
end.