import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		char[] s = br.readLine().toCharArray();
		br.close();

		int[] dx = {1, 0, 0};
		int[] dy = {0, 1, -1};
		int x = 0;
		int y = 0;
		Set<String> set = new HashSet<>();
		set.add(toStr(x, y));
		for (int i = 0; i < s.length; i++) {
			int tx = dx[s[i] - 'a'];
			int ty = dy[s[i] - 'a'];
			if ((tx == 1 && ty == 0) || (tx == -1 && ty == 0)) {
				for (int j = 0; j < 3; j++) {
					if (dx[j] == tx && dy[j] == ty) {
						dx[j] = -dx[j];
					}
				}
			} else if (tx == 0 && ty == 1) {
				int[] nx = Arrays.copyOf(dx, 3);
				int[] ny = Arrays.copyOf(dy, 3);
				int bx = 0;
				for (int j = 0; j < 3; j++) {
					if (dx[j] == tx && dy[j] == ty) {
						ny[j] = -1;
					} else if (dy[j] == 0) {
						bx = dx[j];
						nx[j] = 0;
						ny[j] = 1;
					}
				}
				for (int j = 0; j < 3; j++) {
					if (dy[j] == -1) {
						nx[j] = -bx;
						ny[j] = 0;
					}
				}
				dx = nx;
				dy = ny;
			} else if (tx == 0 && ty == -1) {
				int[] nx = Arrays.copyOf(dx, 3);
				int[] ny = Arrays.copyOf(dy, 3);
				int bx = 0;
				for (int j = 0; j < 3; j++) {
					if (dx[j] == tx && dy[j] == ty) {
						ny[j] = 1;
					} else if (dy[j] == 0) {
						bx = dx[j];
						nx[j] = 0;
						ny[j] = -1;
					}
				}
				for (int j = 0; j < 3; j++) {
					if (dy[j] == 1) {
						nx[j] = -bx;
						ny[j] = 0;
					}
				}
				dx = nx;
				dy = ny;
			}
			x += tx;
			y += ty;
			set.add(toStr(x, y));
		}
		System.out.println(set.size());
	}

	static String toStr(int x, int y) {
		return x + "," + y;
	}
}