The Beroil corporation structure is hierarchical, that is it can be represented as a tree. Let's examine the presentation of this structure as follows:

  * employee ::= name. | name:employee1,employee2, ... ,employeek.
  * name ::= name of an employee 



That is, the description of each employee consists of his name, a colon (:), the descriptions of all his subordinates separated by commas, and, finally, a dot. If an employee has no subordinates, then the colon is not present in his description.

For example, line MIKE:MAX.,ARTEM:MIKE..,DMITRY:DMITRY.,DMITRY... is the correct way of recording the structure of a corporation where the director MIKE has subordinates MAX, ARTEM and DMITRY. ARTEM has a subordinate whose name is MIKE, just as the name of his boss and two subordinates of DMITRY are called DMITRY, just like himself.

In the Beroil corporation every employee can only correspond with his subordinates, at that the subordinates are not necessarily direct. Let's call an uncomfortable situation the situation when a person whose name is s writes a letter to another person whose name is also s. In the example given above are two such pairs: a pair involving MIKE, and two pairs for DMITRY (a pair for each of his subordinates).

Your task is by the given structure of the corporation to find the number of uncomfortable pairs in it.

<image>

Input

The first and single line contains the corporation structure which is a string of length from 1 to 1000 characters. It is guaranteed that the description is correct. Every name is a string consisting of capital Latin letters from 1 to 10 symbols in length.

Output

Print a single number — the number of uncomfortable situations in the company.

Examples

Input

MIKE:MAX.,ARTEM:MIKE..,DMITRY:DMITRY.,DMITRY...


Output

3


Input

A:A..


Output

1


Input

A:C:C:C:C.....


Output

6
import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.InputMismatchException;
import java.util.Map;

/**
 * @author Egor Kulikov (egor@egork.net)
 */
public class TaskC {
	@SuppressWarnings({"FieldCanBeLocal", "UnusedDeclaration"})
	InputReader in;
	PrintWriter out;

	static class MultiSet<K> {
		Map<K, Integer> map = new HashMap<K, Integer>();
		int size = 0;

		int size() {
			return size;
		}

		int entryCount() {
			return map.size();
		}

		boolean isEmpty() {
			return size == 0;
		}

		boolean contains(K key) {
			return map.containsKey(key);
		}

		int add(K key) {
			Integer value = map.get(key);
			if (value == null)
				value = 0;
			value++;
			size++;
			map.put(key, value);
			return value;
		}

		int remove(K key) {
			Integer value = map.get(key);
			if (value == null)
				return 0;
			value--;
			size--;
			if (value == 0)
				map.remove(key);
			else
				map.put(key, value);
			return value + 1;
		}

		int removeAll(K key) {
			int value = map.remove(key);
			size -= value;
			return value;
		}

		void clear() {
			map.clear();
			size = 0;
		}

		int get(K key) {
			Integer value = map.get(key);
			if (value == null)
				value = 0;
			return value;
		}

		@Override
		public boolean equals(Object o) {
			if (this == o)
				return true;
			if (o == null || getClass() != o.getClass())
				return false;

			MultiSet multiSet = (MultiSet) o;

			return !(map != null ? !map.equals(multiSet.map) : multiSet.map != null);

		}

		@Override
		public int hashCode() {
			return map.hashCode();
		}
	}

	void solve() {
		out.println(readEmployees(new MultiSet<String>()));
	}

	private int readEmployees(MultiSet<String> superiors) {
		StringBuilder name = new StringBuilder();
		char ch;
		while ((ch = in.readCharacter()) != '.' && ch != ':')
			name.append(ch);
		int result = superiors.get(name.toString());
		if (ch == '.')
			return result;
		superiors.add(name.toString());
		do
			result += readEmployees(superiors);
		while (in.readCharacter() == ',');
		superiors.remove(name.toString());
		return result;
	}

	public static void main(String[] args) {
		new TaskC().run();
	}

	TaskC() {
		@SuppressWarnings({"UnusedDeclaration"})
		String id = getClass().getName().toLowerCase();
		//noinspection EmptyTryBlock
		try {
//			System.setIn(new FileInputStream(id + ".in"));
//			System.setOut(new PrintStream(new FileOutputStream(id + ".out")));
//			System.setIn(new FileInputStream("input.txt"));
//			System.setOut(new PrintStream(new FileOutputStream("output.txt")));
		} catch (Exception e) {
			throw new RuntimeException(e);
		}
		in = new InputReader(System.in);
		out = new PrintWriter(System.out);
	}

	void run() {
		//noinspection InfiniteLoopStatement
//		int testCount = in.readInt();
//		for (int i = 0; i < testCount; i++)
//		while (true)
		solve();
		exit();
	}

	@SuppressWarnings({"UnusedDeclaration"})
	void exit() {
		out.close();
		System.exit(0);
	}

	@SuppressWarnings({"UnusedDeclaration"})
	static class InputReader {
		InputStream stream;
		byte[] buf = new byte[1024];
		int curChar, numChars;

		InputReader(InputStream stream) {
			this.stream = stream;
		}

		int read() {
			if (numChars == -1)
				throw new InputMismatchException();
			if (curChar >= numChars) {
				curChar = 0;
				try {
					numChars = stream.read(buf);
				} catch (IOException e) {
					throw new InputMismatchException();
				}
				if (numChars <= 0)
					return -1;
			}
			return buf[curChar++];
		}

		int readInt() {
			int c = read();
			while (isSpaceChar(c))
				c = read();
			int sgn = 1;
			if (c == '-') {
				sgn = -1;
				c = read();
			}
			int res = 0;
			do {
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = read();
			} while (!isSpaceChar(c));
			return res * sgn;
		}

		long readLong() {
			int c = read();
			while (isSpaceChar(c))
				c = read();
			int sgn = 1;
			if (c == '-') {
				sgn = -1;
				c = read();
			}
			long res = 0;
			do {
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = read();
			} while (!isSpaceChar(c));
			return res * sgn;
		}

		String readString() {
			int c = read();
			while (isSpaceChar(c))
				c = read();
			StringBuffer res = new StringBuffer();
			do {
				res.appendCodePoint(c);
				c = read();
			} while (!isSpaceChar(c));
			return res.toString();
		}

		boolean isSpaceChar(int c) {
			return c == ' ' || c == '\n' || c == '\r' || c == '\t' || c == -1;
		}

		String readLine0() {
			StringBuffer buf = new StringBuffer();
			int c = read();
			while (c != '\n' && c != -1) {
				if (c != '\r')
					buf.appendCodePoint(c);
				c = read();
			}
			return buf.toString();
		}

		String readLine() {
			String s = readLine0();
			while (s.trim().length() == 0)
				s = readLine0();
			return s;
		}

		String readLine(boolean ignoreEmptyLines) {
			if (ignoreEmptyLines)
				return readLine();
			else
				return readLine0();
		}

		BigInteger readBigInteger() {
			try {
				return new BigInteger(readString());
			} catch (NumberFormatException e) {
				throw new InputMismatchException();
			}
		}

		char readCharacter() {
			int c = read();
			while (isSpaceChar(c))
				c = read();
			return (char) c;
		}

		double readDouble() {
			int c = read();
			while (isSpaceChar(c))
				c = read();
			int sgn = 1;
			if (c == '-') {
				sgn = -1;
				c = read();
			}
			double res = 0;
			while (!isSpaceChar(c) && c != '.') {
				if (c == 'e' || c == 'E')
					return res * Math.pow(10, readInt());
				if (c < '0' || c > '9')
					throw new InputMismatchException();
				res *= 10;
				res += c - '0';
				c = read();
			}
			if (c == '.') {
				c = read();
				double m = 1;
				while (!isSpaceChar(c)) {
					if (c == 'e' || c == 'E')
						return res * Math.pow(10, readInt());
					if (c < '0' || c > '9')
						throw new InputMismatchException();
					m /= 10;
					res += (c - '0') * m;
					c = read();
				}
			}
			return res * sgn;
		}

		int[] readIntArray(int size) {
			int[] array = new int[size];
			for (int i = 0; i < size; i++)
				array[i] = readInt();
			return array;
		}

		long[] readLongArray(int size) {
			long[] array = new long[size];
			for (int i = 0; i < size; i++)
				array[i] = readLong();
			return array;
		}

		double[] readDoubleArray(int size) {
			double[] array = new double[size];
			for (int i = 0; i < size; i++)
				array[i] = readDouble();
			return array;
		}

		String[] readStringArray(int size) {
			String[] array = new String[size];
			for (int i = 0; i < size; i++)
				array[i] = readString();
			return array;
		}

		char[][] readTable(int rowCount, int columnCount) {
			char[][] table = new char[rowCount][columnCount];
			for (int i = 0; i < rowCount; i++) {
				for (int j = 0; j < columnCount; j++)
					table[i][j] = readCharacter();
			}
			return table;
		}

		void readIntArrays(int[]...arrays) {
			for (int i = 0; i < arrays[0].length; i++) {
				for (int j = 0; j < arrays.length; j++)
					arrays[j][i] = readInt();
			}
		}
	}
}
