12 times! F, a( b) N% Y
7 h3 V" J5 |; }( t0 l1 ]0 l
each time 4 person but 1 need to back to pick up the other 3 " S4 S) l+ @0 T# y/ v1 Twww2.tvboxnow.comreturn x 10 = 30 people ( ?& v% X' Z( m公仔箱論壇1 time return . m2 `. f" ~) C- n4 X# |5 j- a2 person on last time 0 O1 L% W, _# p: J E# P+ n& Ktotal : 12 times