import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String scan = scanner.nextLine();
String[] str = scan.split(" ");
int length = str[str.length-1].length();
System.out.println(length);
}
}

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