package codeforce; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; public class ProblemB { public static void main(String[] args) throws IOException { // TODO Auto-generated method stub BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); StringBuilder s = new StringBuilder(br.readLine()); int count = 0; if(go(s, count) % 2 == 0) { System.out.println("NO"); } else { System.out.println("YES"); } } public static int go(StringBuilder s, int count) { for(int i = 1; i < s.length(); i++) { if(s.charAt(i) == s.charAt(i-1)) { s.replace(i-1, i+1, ""); return go(s, count+1); } } return count; } }