North Welsh wording would be good if there is the option of giving alternatives in the given sentence.
We can't give two given sentences, but "Dach chi wedi mynd allan?" is an accepted answer for the reverse exercise.
Both ma's and allan are used in the various Welsh prompt sentences - with each phrase, each should come up about half the time - and either one is always acceptable in place of the other in answers to English prompts.
Similarly, Dach chi and Dych chi are interchangeable, but we do not currently include mid- and S Wales variants such as Dech chi, Ych chi, Ŷch chi, etc.