#include <iostream>
#include <cstring>

using namespace std;

int quan;
char word[100005];

int main()
{
	cin >> word;

	for ( int i = 0; i < strlen(word); i++ )
	{
		if ( word[i] == ':' || word[i] == ';' )
		{
			for ( int x = i+1; x < strlen(word); x++ )
			{
				if ( word[x] == '-' )
				{
					continue;
				}
				if ( word[x] == '(' || word[x] == ')' || word[x] == '[' || word[x] == ']' )
				{
					quan++;
					i = x-1;
					break;
				}
				else
				{
					i = x-1;
					break;
				}
			}
		}
	}

	cout << quan;

	return 0;
}