S and T: ex lovers
T and U: ex lovers - Kat and Salman
T and V: couple - Kat and Ranbir
V and W: kids of romantic couple on screen - Ranbir and Kareena?
W and X: BW's second hand spouse - Kareena and ?
X and Y: parent and kid
Y and Z: good friends at present
This is hard
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