#include <bits/stdc++.h>   using namespace std;   int main() {     string s1, s2;     getline(cin, s1);     getline(cin, s2);     int yek1 = 0, yek2 = 0;     for (int i = 0; i < s1.size(); i++) {       if (s1[i] ==  1 ) yek1++;     }     for (int i = 0; i < s2.size(); i++) {       if (s2[i] ==  1 ) yek2++;     }     if (yek1 % 2 == 1) yek1++;     if (yek1 >= yek2) {       cout <<  YES ;       return 0;     }     cout <<  NO ;   }   