print((function (f, s)
	return f(s)
end)(function (s)
	local r = #s*2+1
	for i=1,#s do
		local c = s:sub(i,i)
		if c=="0" or c=="4" or c=="6" or c=="9" then r=r+1
		elseif c=="8" then r=r+2 end
	end
	return r
end, io.stdin:read("*l")))