A insert 100
la100-0
A upload 100
la100-1
w100-1/1
B download
la100-1
w100-1/1
lb100-1
A delete 99
la1-1 la99-1[delete]
w100-1/1
lb1-1 lb99-1
A upload
la1-2
w1-1/2
lb1-1 lb99-1
B download
la1-2
w1-1/2
lb1-2
B change 1 and insert 100
la1-2
w1-1/2
lb1-2 lb100-2
B upload
la1-2
w1-3/3 w100-3/3
lb1-3 lb100-3
A insert 50
la1-2 la50-2
w1-3/3 w100-3/3
lb1-3 lb100-3
A download
la1-3 la100-3 la50-3
w1-3/3 w100-3/3
lb1-3 lb100-3
A upload
la1-4 la100-4 a50-4
w1-3/4 w100-3/4 w50-4/4
lb1-3 lb100-3
B download
la1-4 la100-4 a50-4
w1-3/4 w100-3/4 w50-4/4
lb1-4 lb100-4 lb50-4