import Foundation

enum Color: Character, CustomStringConvertible {
    case r = "r"
    case g = "g"
    case u = "u"
    case w = "w"
    case b = "b"
    var description: String { return String(self.rawValue) }
}

func readInput(_ filePath: String) throws -> ([[Color]], [[Color]]) {
    let content = try String(contentsOfFile: filePath, encoding: .ascii)
    let lines = content.split(separator: "\n")
    let towels = lines[0].split(separator: ", ").map { $0.compactMap(Color.init) }
    let patterns = lines[1..<lines.count].map { $0.compactMap(Color.init) }
    return (towels, patterns)
}

var cache: [[Color]: Int] = [:]
func matches(_ pattern: [Color], _ towels: [[Color]]) -> Int {
    if pattern.count == 0 {
        return 1
    }
    if let cached = cache[pattern] {
        return cached
    }
    let r = towels
        .filter { pattern.starts(with: $0) }
        .map { matches(Array(pattern[$0.count..<pattern.count]), towels) }
        .reduce(0, +)
    cache[pattern] = r
    return r
}

let (towels, patterns) = try readInput(CommandLine.arguments[1])
print(patterns.reduce(0) { s, p in s + matches(p, towels) })