client1	mall1	27
client2	mall1	22
client3	mall1	35
client4	mall1	22
client5	mall1	30
client6	mall1	17
client7	mall1	18
client8	mall1	21
client9	mall1	22
client10	mall1	29
client11	mall1	4
client12	mall1	15
client13	mall1	26
client14	mall1	15
client15	mall1	14
client16	mall1	25
client17	mall1	37
client18	mall1	8
client19	mall1	13
client20	mall1	20
