Define a function count$\_$type$($map$\_$data, map$\_$type$)$:

map$\_$data: A list of lists representing the data for a given map.

map$\_$type: A string representing a map type $(\text{'}$T$\text{'},\text{'}$A$\text{'},\text{'}$R$\text{'},\text{'}$C$\text{'},\text{'}$W$\text{'},$ or $\text{'}$U$\text{'})$

Return: An integer representing the number of times map$\_$type occurs in map$\_$data.