NR name output1
1  a    pan
1  b    before
2  a    eks
2  b    before
3  a    wye
3  b    before
4  a    eks
4  b    before
5  a    wye
5  b    before
6  a    zee
6  b    before
7  a    eks
7  b    before
8  a    zee
8  b    before
9  a    hat
9  b    before
10 a    pan
10 b    before

NR names output2
1  a_a   pan
1  a_b   pan
1  a_i   1
1  a_x   0.3467901443380824
1  a_y   0.7268028627434533
2  a_a   eks
2  a_b   pan
2  a_i   2
2  a_x   0.7586799647899636
2  a_y   0.5221511083334797
3  a_a   wye
3  a_b   wye
3  a_i   3
3  a_x   0.20460330576630303
3  a_y   0.33831852551664776
4  a_a   eks
4  a_b   wye
4  a_i   4
4  a_x   0.38139939387114097
4  a_y   0.13418874328430463
5  a_a   wye
5  a_b   pan
5  a_i   5
5  a_x   0.5732889198020006
5  a_y   0.8636244699032729
6  a_a   zee
6  a_b   pan
6  a_i   6
6  a_x   0.5271261600918548
6  a_y   0.49322128674835697
7  a_a   eks
7  a_b   zee
7  a_i   7
7  a_x   0.6117840605678454
7  a_y   0.1878849191181694
8  a_a   zee
8  a_b   wye
8  a_i   8
8  a_x   0.5985540091064224
8  a_y   0.976181385699006
9  a_a   hat
9  a_b   wye
9  a_i   9
9  a_x   0.03144187646093577
9  a_y   0.7495507603507059
10 a_a   pan
10 a_b   wye
10 a_i   10
10 a_x   0.5026260055412137
10 a_y   0.9526183602969864
