id:7,age:27
id:8,age:28
id:9,age:29
delete id:0
delete id:1
delete id:2
delete id:3
delete id:4
delete id:5
delete id:6
delete id:7
delete id:8
delete id:9
id:0,age:20
id:1,age:21
id:2,age:22
id:3,age:23
id:4,age:24
id:5,age:25
id:6,age:26
id:7,age:27
id:8,age:28
id:9,age:29
delete id:0
delete id:1
delete id:2
delete id:3
dp@dp:~/memorytest %