local mce, mfl, msq, mmi, mma, mab = math.ceil, math.floor, math.sqrt, math.min, math.max, math.abs
local bls, brs = bit.lshift, bit.rshift

local function getprimes(x)
  local primes = {}
  local allnums = {}
  for i = 1, x do allnums[i] = true end
  for i = 2, x do
    if allnums[i] then
      table.insert(primes, i)
      local lim = mfl(x / i)
      for j = 2, lim do
        allnums[j * i] = false
      end
    end
  end
  return primes
end
local primes = getprimes(1000000)
local function isprime(x)
  for i = 1, #primes do
    if x == primes[i] then return true end
    if x % primes[i] == 0 then return false end
  end
  return true
end

local s = io.read()
local n = #s
local t = {}
for i = 1, n do
  t[i] = s:byte(i) - 48
end
local ret = 0
local tot = bls(1, n - 1)
for i = 0, tot - 1 do
  local v = 0
  local c = t[1]
  local ti = i
  for j = 2, n do
    if ti % 2 == 0 then
      c = c * 10 + t[j]
    else
      v = v + c
      c = t[j]
    end
    ti = brs(ti, 1)
  end
  v = v + c
  -- print(v)
  if isprime(v) then
    ret = ret + 1
  end
end
print(ret)