How many 8s are there in the following sequence which are immediately preceded by 6 but not immediately following by 5? \[6\text{ }8\text{ }5\text{ }7\text{ }8\text{ }5\text{ }4\text{ }3\text{ }6\text{ }8\text{ }1\text{ }9\text{ }8\text{ }5\text{ }4\text{ }6\text{ }8\text{ }2\text{ }9\text{ }6\text{ }8\text{ }1\text{ }3\text{ }6\text{ }8\text{ }5\text{ }3\text{ }6\]