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| x1 | x2 | rest1 | rest2 | lev |
|---|---|---|---|---|
| 1 | a | 2,3,4,5 | b,c,d,e | 2 |
| 2 | b | 3,4,5 | c,d,e | 3 |
| 3 | c | 4,5 | d,e | 4 |
| 4 | d | 5 | e | 5 |
| 5 | e | 6 |
| x1 | x2 | rest1 | rest2 | lev |
|---|---|---|---|---|
| 1 | a | 2,3,4,5 | b,c,d,e | 2 |
| 2 | b | 3,4,5 | c,d,e | 3 |
| 3 | c | 4,5 | d,e | 4 |
| 4 | d | 5 | e | 5 |
| 5 | e | 6 |