If three groups could be formed using the given figures only once, these groups would be ______.
1
(1, 8, 7), (2, 6, 9) and (4, 3, 5)
2
(2, 5, 7), (1, 6, 9) and (4, 3, 8)
3
(1, 5, 7), (2, 6, 8) and (4, 3, 9)
4
(1, 5, 7), (2, 6, 9) and (4, 3, 8)
If three groups could be formed using the given figures only once, these groups would be ______.