    y form batch oper   assem
1  24    A     1    1   alpha
2  17    B     2    1    beta
3  18    C     3    1   gamma
4  26    D     4    1   delta
5  22    E     5    1 epsilon
6  20    B     1    2   gamma
7  24    C     2    2   delta
8  38    D     3    2 epsilon
9  31    E     4    2   alpha
10 30    A     5    2    beta
11 19    C     1    3 epsilon
12 30    D     2    3   alpha
13 26    E     3    3    beta
14 26    A     4    3   gamma
15 20    B     5    3   delta
16 24    D     1    4    beta
17 27    E     2    4   gamma
18 27    A     3    4   delta
19 23    B     4    4 epsilon
20 29    C     5    4   alpha
21 24    E     1    5   delta
22 36    A     2    5 epsilon
23 21    B     3    5   alpha
24 22    C     4    5    beta
25 31    D     5    5   gamma