client1	mall1	11
client2	mall1	30
client3	mall1	30
client4	mall1	50
client5	mall1	38
client6	mall1	19
client7	mall1	27
client8	mall1	27
client9	mall1	19
client10	mall1	33
client11	mall1	17
client12	mall1	30
client13	mall1	37
client14	mall1	5
client15	mall1	27
client16	mall1	17
client17	mall1	28
client18	mall1	12
client19	mall1	25
client20	mall1	26
