A12 strata
Sequential (large file)
s 1
s 2
s 3
s 4
s 5
s 6
s 7
s B1
s B2
s B3
s B4
s B5
s B6
s B7
s B8
s B9
s C1
s C2
s C3
s C4
s C5
s C6
s C7
s C8
s C9
s C10
Total: 26