program ideone;
var x,k,s,n : Integer;
begin
Write('x='); Readln(x);
Write('k='); Readln(k);
while (x <> 0) and (n < k) do
begin
if n < k then s := s + x mod 10;
x := x div 10;
Inc(n);
end;
WriteLn('s=', s);
end.
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