Freight Container Tag Match Count

A freight yard keeps a manifest of the containers currently on site. Each entry lists three tags for a container, always in the same order: its cargo category, its finish code, and its serial code. A yard inspector wants to know how many containers have one particular tag field equal to a specific value — for instance, how many containers have finish code "blue". Given the manifest and the inspector's query (which field to check, and what value it must equal), count how many containers satisfy the query.

Input format

Line 1: two space-separated tokens — a field name that is exactly one of "category", "finish", or "code", followed by a target value (a single token, no embedded whitespace) to match against that field. Line 2: a single integer N — the number of containers in the manifest. Next N lines: each contains three space-separated tokens — that container's category, finish, and code, in that order.

Output format

Print a single integer: the number of containers whose specified field equals the target value exactly (case-sensitive, exact string match — not a substring match).

Constraints

1 <= N <= 10^4 Every token (each manifest field value, the field name, and the target value) consists of 1 to 15 characters drawn from lowercase English letters and digits only, with no internal whitespace. The field name on line 1 is guaranteed to be exactly one of "category", "finish", "code".

finish blue
4
metal blue c1
plastic blue c2
metal red c3
wood blue c4

3

code c3
3
metal blue c1
plastic green c3
wood blue c3

2