Vova bought a ticket in a tram of the 13th route and
counted the sums of the first three and the last three digits of
the ticket's number (the number has six digits). It turned out
that the sums differed by one exactly. "I'm one step from happiness,"
Vova thought, "either the previous or the next ticket is lucky."
Is he right?
The input contains the number of the ticket. The number consists of six digits,
some of which can be zeros. It is guaranteed that Vova counted correctly, i.e.,
that the sum of the first three digits differs from the sum of the last three digits
by one exactly.
Output "Yes" if Vova is right and "No" otherwise.
All tram tickets have exactly six digits. A ticket is considered lucky if the sum of its first three digits equals the sum of its last three digits.
Problem Author: Vladimir Yakovlev
Problem Source: XIII-th USU Junior Contest, October 2006