\e\ is a sound that is basically impossible to represent unambiguously to English speakers, without falling back to how it's used in words ('e' as in 'ten', for example).
`eh` and `ay` can both easily be read as a dipthong that would be represented as `ei` in any reasonably spelled language (like Finnish).
`eh` and `ay` can both easily be read as a dipthong that would be represented as `ei` in any reasonably spelled language (like Finnish).