jimmy, wai, marcus, collie, ben, andy, kwai, fat wong, fat lo, benny, suen, mok siu, bun chai - 13 ok
ah ming, tai bill, sony, lo b - not ok

kwai x 1 (a : forget)
andy x 1 (a : jimmy)
jimmy x 1 (a : marcus)
mok siu x 1 (a : forget)
collie x 2 (a : no x 1 / forget x 1)
6 : 0
jimmy, collie, marcus, ben, fat lo, kwai, wai, fat wong, andy, mok siu, suen, benny