Vowels: Standard - 'u' as in 'put', 'i' as in 'sit'
Variation - 'aya' is a combination of the dipthong 'ai' and the standard 'a' as in 'path' ie say 'aiy-ah' in this phrase the 'a' has been replaced with 'i' the ending showing that it is an order to one person. That is say 'aiy-ii'.
Consonant combination - 'ng' (velar nasal) with top of tongue touching top of the back of the mouth, combine 'n' and 'g' plus some nasal vibration.