struct Scanner {
    private var elements = [String]()
    private var index = 0

    mutating func peek() -> String {
        while elements.count == index {
            elements = readLine()!.split(separator: " ").map(String.init)
            index = 0
        }
        return elements[index]
    }

    mutating func next() -> String {
        defer { index += 1 }
        return peek()
    }

    mutating func nextInt() -> Int {
        return Int(next())!
    }

    mutating func nextInts(_ n: Int) -> [Int] {
        return (0 ..< n).map { _ in nextInt() }
    }

    mutating func nextDouble() -> Double {
        return Double(next())!
    }
}

struct Zomega: Hashable {
    let x: Int
    let y: Int

    init(_ x: Int, _ y: Int) {
        self.x = x
        self.y = y
    }

    static prefix func - (this: Self) -> Self {
        Zomega(-this.x, -this.y)
    }

    static func + (lhs: Self, rhs: Self) -> Self {
        Zomega(lhs.x + rhs.x, lhs.y + rhs.y)
    }

    static func - (lhs: Self, rhs: Self) -> Self {
        Zomega(lhs.x - rhs.x, lhs.y - rhs.y)
    }

    static func * (lhs: Self, rhs: Self) -> Self {
        Zomega(lhs.x * rhs.x - lhs.y * rhs.y, lhs.x * rhs.y + lhs.y * rhs.x - lhs.y * rhs.y)
    }
}

var scanner = Scanner()

var visited = Set<Zomega>()

var a = Zomega(1, 0)
var b = Zomega(0, 1)
var c = Zomega(-1, -1)
var z = Zomega(0, 0)

visited.insert(z)

for x in scanner.next() {
    switch x {
    case "a":
        z = z + a
        a = -a
        (b, c) = (-c, -b)
    case "b":
        z = z + b
        b = -b
        (c, a) = (-a, -c)
    default:
        z = z + c
        c = -c
        (a, b) = (-b, -a)
    }
    visited.insert(z)
}
print(visited.count)