client1	mall1	42
client1	mall2	18
client2	mall1	23
client2	mall2	32
client3	mall1	30
client3	mall2	39
client4	mall1	37
client4	mall2	39
client5	mall1	15
client5	mall2	36
client6	mall1	17
client6	mall2	32
client7	mall1	32
client7	mall2	41
client8	mall1	18
client8	mall2	31
client9	mall1	17
client9	mall2	32
client10	mall1	28
client10	mall2	14
client11	mall1	24
client11	mall2	24
client12	mall1	35
client12	mall2	26
client13	mall1	25
client13	mall2	39
client14	mall1	22
client14	mall2	34
client15	mall1	7
client15	mall2	32
