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 Class | IHSAA Football Class | # / County |
| --- | --- | --- | --- | --- | --- | --- |
| Muncie Delta | Muncie | Eagles | 863.0 | AAA | AAAA | 18 Delaware |
| Greenfield Central | Greenfield | Cougars | 1410.0 | AAAA | AAAA | 30 Hancock |
| Mount Vernon Fortville | Fortville | Marauders | 1077.0 | AAA | AAAA | 30 Hancock |
| New Palestine | New Palestine | Dragons | 1092.0 | AAAA | AAAA | 30 Hancock |
| Pendleton Heights | Pendleton | Arabians | 1235.0 | AAAA | AAAA | 48 Madison |
| Rushville Consolidated | Rushville | Lions | 815.0 | AAA | AAA | 70 Rush |
| Shelbyville | Shelbyville | Golden Bears | 1153.0 | AAAA | AAAA | 73 Shelby |
| Yorktown | Yorktown | Tigers | 755.0 | AAA | AAA | 18 Delaware |
Question:
Name the IHSAA class with county 18 delaware and tigers mascot
Answer:
AAA