I am trying to split a number such as "4378" into individual digits, then stored to a variable as a string. Could anyone help?

```py
x = 4378
#code to split number
y = "4,3,7,8"

```

I have seen answers showing how to split a number like this and put the output into a list. This will not work for my program since it will be spoken using gTTS, which cannot speak lists. Any help is appreciated!