var a:array[1..6]of integer;
    i:integer;
    g:char;
    s:string;
begin
read(s);
for i:=1 to 6 do
val(s[i],a[i],g);
if (a[6]<>9) and
((a[1]+a[2]+a[3]=a[4]+a[5]+a[6]+1)or
(a[1]+a[2]+a[3]=a[4]+a[5]+a[6]-1))then
writeln('Yes') else writeln('No');
end.

try this case:

550009

answer should be "No"