#include <fstream>
#include <string.h>

using namespace std;

ifstream fin("bool.in");
ofstream fout("bool.out");

char s[1001][1001], x[1001], *p, *p2, *p3;
int i, n;
int grad_4()
int grad_3();
int grad_2();
int grad_1();
int grad_4(){
    int r = grad_3();
    if( s[i] == "NOT"){
    if(val[s[i + 1]])
        val[s[i + 1]] = 0;
    else
        val[s[i + 1]] = 1;
    i ++;
    }
    return r;
}
int grad_3(){
    int r = grad_2();
    if(s[i] == "OR" || s[i] == "AND")
        if(s[i] == "OR"){
            if(val[s[i - 1] == 1 %%)
            i ++
            }
        else{

            i ++;
            }

}
int main()
{
    while (fin.getline(x,1000)) {
        fin.get();

        p = strtok(x," ");
        while (p != NULL) {
            strcpy(s[++ n], p);
            p = strtok(NULL, " ");
        }
    }

    return 0;
}