You can use these formats to generate your list :

1. * - means [a-z].
2. [0-9] - means 0, 1, 2, ..., 9.
3. [a-z] - means a, b, c, d, ..., z.
4. [a-z0-9] - means combination of [a-z] and [0-9].
5. {*} - means [a-z] without q, v, w, x, y, z.
6. {C} - means consonants.
7. {C2} - means consonants without q, v, w, x, y, z.
8. {C3} - means consonants without j, q, v, w, x, y, z.
9. {V} - means vowels (a, e, i, o, u).
10. You can define your own char set.
    For example if you want "d, g, m, p", you can use [dgmp]

If you want to search names that consist of a consonant and followed by "axe", you can use this format :

"{C}axe" (apply)

If you want to search names that consist of a consonant and followed by a vowel and "xe", you can use this format :

"{C}{V}xe" (apply)