This exercise will help you to hear II - V progressions. I will play two II - V progressions consecutively and you need to distinguish the interval between them. For example if I give you Dmi7 - G7 - Ebmi7 - Ab7 then the answer would be a half step up because the second II - V progression is a half step up from the first. These different types of progressions are common in jazz music and if you are able to distinguish between them you will have a better understanding of the music and will hopefully allow you to eventually learn jazz tunes by ear.