--string.char(97)はa
local t = {}
local str = io.read("*l")
for i = 97, 122 do
  t[i] = 0
end
for i = 1, #str do
  local num = string.byte(string.sub(str, i, i))
  t[num] = t[num] + 1
end
for i = 97, 122 do
  if t[i] % 2 == 1 then
    print("No")
    os.exit()
  end
end
print("Yes")