How many times '7' is immediately followed by 9 but not immediately preceded by an odd number?

6 7 9 7 4 5 7 9 8 7 9 2 4 7 9 7 3 7 9 1 7 9 7 2 7 9 3

1
4
2
3
3
5
4
2
5
Not Attempted

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