n = int(input())
a = n
m = 0

while a > 0:
    a = a // 10
    m = m + 1
print(m)
flag = 0

if m % 2 != 0:
    flag = 1

m = m // 2

x = 10 ** (m-1)
k = 0
for i in range(m):
    a = n % 10
    n = n // 10
    a = a * x
    x = x / 10
    k = k + a

if flag == 1:
    n = n // 10

print(k, n)

if k == n:
    print("YES")
else:
    print("NO")