Over/Under 2NT showing both minors both majors (7-10 Hcp)

The opening promise 5-5 in the minors or majors, and a weak hand in point values. Partner responds, and Opener continues as follows:

3C: Preference
- Pass with minor.
- 3D with major.

3D: Preference - Pass with minor.
- 3H with major.

3H: Invitation in heart, ask for 3NT if minor.
- Pass with major and minimum.
- 3NT with minor.
- 4C/D with void and major.
- 4H with major and maximum.

3S: Invitation in spade, ask for 3NT if minor.
- Pass with major and minimum.
- 3NT with minor.
- 4C/D with void and major.
- 4S with major and maximum.
3NT: To play if minor.

- 4C void and major.
- 4D void and major.
- 4H with major.