import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;
import static java.lang.System.in;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(in));
        String S = reader.readLine();
        int[] table = new int[S.length()];
        for (int i = 0; i < S.length(); i++) {
            if (S.charAt(i) == '…') {
                table[i] = 1;
            }
        }
        for (int i = 1; i < S.length(); i++) {
            if(table[i] != 0) {
                table[i] = table[i] + table[i - 1];
            }

        }
        System.out.println(Arrays.stream(table).max().getAsInt());
    }
}