var
    t,i,ul,pn:longint;
    u:array[0..99] of integer=(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);
    s:string;

begin
    assign(input,'cifra.in');reset(input);
    assign(output,'cifra.out');rewrite(output);
    readln(t);
        for i:=1 to t do begin
            readln(s);
            ul:=0;
            ul:=ord(s[length(s)])-48;
            if length(s)>1 then ul:=ul+(ord(s[length(s)-1])-48)*10;
            writeln(u[ul]);
        end;
    close(input);close(output);
end.