genzo2106

solution:
$ R+ _: j  F! X8 Z" h3 v5 ]
* A6 F4 P2 h' o8 i7 l1st and 2nd lady go over: 2 mins taken公仔箱論壇2 F/ z: u" P( q& e+ s
1st lady walk back: 1 mins taken
3 H, Q7 V1 ]* t1 Z# w2 z4 c3 ^5.39.217.773rd and 4th lady go over: 10 mins taken
+ q9 `# I9 Z1 K; X# A1 Btvb now,tvbnow,bttvb2nd lady walk back: 2 mins taken5.39.217.77" Z6 N& q  T2 s
1st and 2nd lady walk back: 2 mins taken5.39.217.77* _5 J+ H  @1 b/ M$ L2 Z' M
公仔箱論壇2 Y5 v3 V3 q( a+ V% S, t7 r
In total : 17 mins taken!!! Solved!!