#include <stdio.h>
#include <string.h>
#include <stdbool.h>

bool solution(char* num) {
    int n = strlen(num);
    int half = n / 2;
    
    // Calculate current sums and count question marks
    int leftSum = 0;
    int rightSum = 0;
    int leftQuestions = 0;
    int rightQuestions = 0;
    
    for (int i = 0; i < half; i++) {
        if (num[i] == '?') {
            leftQuestions++;
        } else {
            leftSum += num[i] - '0';
        }
    }
    
    for (int i = half; i < n; i++) {
        if (num[i] == '?') {
            rightQuestions++;
        } else {
            rightSum += num[i] - '0';
        }
    }
    
    // Current difference (left - right)
    int diff = leftSum - rightSum;
    int netQuestions = leftQuestions - rightQuestions;
    
    // Alice wins if: 2*diff + 9*net_questions != 0
    return 2 * diff + 9 * netQuestions != 0;
}

int main() {
    char num[1001];
    fgets(num, sizeof(num), stdin);
    num[strcspn(num, "\n")] = 0;  // Remove newline
    bool result = solution(num);
    printf(result ? "true\n" : "false\n");
    return 0;
}