#include <stdio.h>

int main(){
	int p,q,r,rez;
	char op1, op2;

	scanf("%d %c %d %c %d", &p, &op1, &q, &op2, &r);
	
	switch(op1){
		case 'k':
			rez = p && q;
			break;
		case 'd':
			rez = p || q;
			break;
		case 'm':
			rez = p<q;
			break;
		case 'v':
			rez = p>q;
			break;
		default:
			printf("-1\n");
			return 1;
	}

        switch(op2){
		case 'k':
			rez = rez && r; 
	              	break;
                case 'd':
                        rez = rez || r;
                        break;
                case 'm':
                        rez = rez < r;
                        break;
                case 'v':
                        rez = rez > r;
                        break;
                default:
                        printf("-1\n");
                        return 1;
        }
	
	printf("%d\n",rez);

	return 0;
}