import java.util.*; @SuppressWarnings("unused") public class Main { private static void solve() { char[] s = ns(); Set set = new HashSet<>(); set.add(0L); long x = 0; long y = 0; for (char d : s) { long mx = (x % 3 + 3) % 3; long mx2 = (x % 6 + 6) % 6; long my = (y % 2 + 2) % 2; if (d == 'a') { if (mx == 0) { x++; } else if (mx == 1) { x--; } else if (mx2 == 2 && my == 0 || mx2 == 5 && my == 1) { y++; } else { y--; } } else if (d == 'b') { if (mx == 0) { x--; } else if (mx == 2) { x--; } else if (mx2 == 1 && my == 0 || mx2 == 4 && my == 1) { y--; } else { y++; } } else if (d == 'c') { if (mx == 1) { x++; } else if (mx == 2) { x--; } else if (mx2 == 0 && my == 0 || mx2 == 3 && my == 1) { y++; } else { y--; } } long h = x * 100000000000L + y; set.add(h); } System.out.println(set.size()); } public static double[] symm(double ax, double ay, double bx, double by, double ux, double uy) { double eps = 1E-10; double aa = by - ay; double bb = -(bx - ax); double cc = bx - ax; double dd = by - ay; double xx = (uy - 2 * ay) * (bx - ax) - (ux - 2 * ax) * (by - ay); double yy = ux * (bx - ax) + uy * (by - ay); double det = aa * dd - bb * cc; if (Math.abs(det) < eps) return null; double t = (dd * xx - bb * yy) / det; double u = (-cc * xx + aa * yy) / det; return new double[] { t, u }; } public static void main(String[] args) { new Thread(null, new Runnable() { @Override public void run() { long start = System.currentTimeMillis(); String debug = args.length > 0 ? args[0] : null; if (debug != null) { try { is = java.nio.file.Files.newInputStream(java.nio.file.Paths.get(debug)); } catch (Exception e) { throw new RuntimeException(e); } } reader = new java.io.BufferedReader(new java.io.InputStreamReader(is), 32768); solve(); out.flush(); tr((System.currentTimeMillis() - start) + "ms"); } }, "", 64000000).start(); } private static java.io.InputStream is = System.in; private static java.io.PrintWriter out = new java.io.PrintWriter(System.out); private static java.util.StringTokenizer tokenizer = null; private static java.io.BufferedReader reader; public static String next() { while (tokenizer == null || !tokenizer.hasMoreTokens()) { try { tokenizer = new java.util.StringTokenizer(reader.readLine()); } catch (Exception e) { throw new RuntimeException(e); } } return tokenizer.nextToken(); } private static double nd() { return Double.parseDouble(next()); } private static long nl() { return Long.parseLong(next()); } private static int[] na(int n) { int[] a = new int[n]; for (int i = 0; i < n; i++) a[i] = ni(); return a; } private static char[] ns() { return next().toCharArray(); } private static long[] nal(int n) { long[] a = new long[n]; for (int i = 0; i < n; i++) a[i] = nl(); return a; } private static int[][] ntable(int n, int m) { int[][] table = new int[n][m]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[i][j] = ni(); } } return table; } private static int[][] nlist(int n, int m) { int[][] table = new int[m][n]; for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { table[j][i] = ni(); } } return table; } private static int ni() { return Integer.parseInt(next()); } private static void tr(Object... o) { if (is != System.in) System.out.println(java.util.Arrays.deepToString(o)); } }