import com.sun.scenario.effect.impl.sw.sse.SSEBlend_SRC_OUTPeer;

import java.util.HashMap;
import java.util.Map;

/**
 * Created by hackmajoris on 12/7/16.
 */
public class Santa7 {
    public static void main(String[] args) {

        String input = "ioxxoj[asdfgh]zxcvbn";
        int numberOfTLS = 0;

        HashMap<Integer, Integer> bracketsIndexes = new HashMap<>();
        String segvenceWithoutBrackets = input;
        int openBracketIndex = 0;
        for (char c : input.toCharArray()) {
            if (c == '[') {
                int closedBrackedIndex = input.indexOf("]", openBracketIndex);
                bracketsIndexes.put(openBracketIndex + 1, closedBrackedIndex);
            }
            openBracketIndex++;
        }

        boolean bracketsSegvenceIsOk = true;

        for (Map.Entry<Integer, Integer> entry : bracketsIndexes.entrySet()) {
            String segvenceToCheck = input.substring(entry.getKey(), entry.getValue());
            segvenceWithoutBrackets = segvenceWithoutBrackets.replace("[" + segvenceToCheck + "]", "");
            if (checkSegvenceForTLS(segvenceToCheck)) {
                bracketsSegvenceIsOk = false;
                break;
            }
        }
        if (bracketsSegvenceIsOk) {
            if(checkSegvenceForTLS(segvenceWithoutBrackets)){
                numberOfTLS ++;
            }
        }

        System.out.println(numberOfTLS);
    }

    static boolean checkSegvenceFromBrackets(String s) {
        if (checkSegvenceForTLS(s)) {
            System.out.println("true");
            return true;
        }
        return false;
    }

    static boolean checkSegvenceForTLS(String s) {
        for (int i = 0; i < s.length(); i++) {
            try {
                if (s.charAt(i) == s.charAt(i + 3) && s.charAt(i + 1) == s.charAt(i + 2) && s.charAt(i) != s.charAt(i + 2)) {
                    return true;
                }
            } catch (Exception e) {
                return false;
            }
        }
        return false;
    }
}