_customers,item1,item2,item3,item4
100000,0,0,0,1
100000,0,0,1,1
100000,0,1,0,1
100000,0,1,1,1
100000,1,0,0,1
100000,1,0,1,1
100000,1,1,0,1
100000,1,1,1,1
100000,0,0,0,0
100000,0,0,1,0
100000,0,1,0,0
100000,0,1,1,0
100000,1,0,0,0
100000,1,0,1,0
100000,1,1,0,0
100000,1,1,1,0