Can you give me in input for which my program fails?

Var
   i,n :byte;
   a,b,k: longint;
   t: array [1..44] of byte;

Begin
     readln(input,n,k);
     Dec(k);
     while (k>0) do
           begin
           a:= 1; b:= 2; i:= 1;
           if (k=a) then t[1]:= 1;
           if (k=b) then t[2]:= 1;
           if ((k=a) or (k=b)) then begin k:= 0; break; end;
           Repeat
                 Inc(i); Inc(a,b);
                 if (a> k) then break;
                 Inc(i); Inc(b,a);
                 until (b> k);
           if (b>a) then b:= a;
           t[i]:= 1;
           Dec(k,b);
           if (i>n) then break;
           end;
     for k:= n downto 1 do
         write(output,t[k]);
End.