Bukvi

import java.io.IOException;
import java.util.Scanner;

interface Stack<E> {

    // Elementi na stekot se objekti od proizvolen tip.

    // Metodi za pristap:

    public boolean isEmpty ();
        // Vrakja true ako i samo ako stekot e prazen.

    public E peek () throws NoSuchElementException ;
        // Go vrakja elementot na vrvot od stekot.

    // Metodi za transformacija:

    public void clear ();
        // Go prazni stekot.

    public void push (E x) ;
        // Go dodava x na vrvot na stekot.

    public E pop () throws NoSuchElementException ;
        // Go otstranuva i vrakja elementot shto e na vrvot na stekot.
}

class ArrayStack<E> implements Stack<E> {
    private E[] elems;
    private int depth;

    @SuppressWarnings("unchecked")
    public ArrayStack (int maxDepth) {
        // Konstrukcija na nov, prazen stek.
        elems = (E[]) new Object[maxDepth];
        depth = 0;
    }


    public boolean isEmpty () {
        // Vrakja true ako i samo ako stekot e prazen.
        return (depth == 0);
    }


    public E peek () throws NoSuchElementException {
        // Go vrakja elementot na vrvot od stekot.
        if (depth == 0)
            throw new NoSuchElementException();
        return elems[depth-1];
    }


    public void clear () {
        // Go prazni stekot.
        for (int i = 0; i < depth; i++)  elems[i] = null;
        depth = 0;
    }


    public void push (E x) {
        // Go dodava x na vrvot na stekot.
        elems[depth++] = x;
    }


    public E pop () throws NoSuchElementException {
        // Go otstranuva i vrakja elementot shto e na vrvot na stekot.
        if (depth == 0)
            throw new NoSuchElementException();
        E topmost = elems[--depth];
        elems[depth] = null;
        return topmost;
    }

    public int getDepth() {
        return this.depth;
    }
}

public class StackBukvi {
static int proveri_t_posle_s(char [] St)
    {
        int br = 0;
        ArrayStack<Character> trska = new ArrayStack<Character>(St.length);

        for(int i = 0; i < St.length; i++){
            if(St[i]=='S')
            br++;
                if(br%2!=0&&St[i]=='T')
                    trska.push(St[i]);
                else if(br%2==0&&St[i]=='T')
                    if(!trska.isEmpty())
                        try{
                            trska.pop();
                        }
                    catch(Exception e){}

        }

        if(trska.isEmpty())
            return 1;
        else
            return 0;

}

    public static void main(String[] args) throws IOException {
        char [] niza=new char[100];

        Scanner f=new Scanner(System.in);
        String st=f.next();
        niza=st.toCharArray();

        int rez= proveri_t_posle_s(niza);
        System.out.print(rez);
    }


}
class NoSuchElementException extends Exception {

}