Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| School | Location | Mascot | Enrollment | IHSAA Football Class | County |
| --- | --- | --- | --- | --- | --- |
| Eastern Greene | Bloomfield | Thunderbirds | 406.0 | A | 28 Greene |
| Linton Stockton | Linton | Miners | 344.0 | A | 28 Greene |
| North Central Farmersburg | Farmersburg | Thunderbirds | 336.0 | A | 77 Sullivan |
| North Daviess | Elnora | Cougars | 306.0 | A | 14 Daviess |
| North Knox | Bicknell | Warriors | 408.0 | A | 42 Knox |
| Union Dugger | Dugger | Bulldogs | 117.0 | A | 77 Sullivan |
| Wood Memorial | Oakland City | Trojans | 292.0 | A | 26 Gibson |
Question:
Which IHSAA Football Class has a County of 77 sullivan, and a School of union dugger?
Answer:
A