import java.util.Scanner;
/**
* Created by LXF on 2017/8/12.
*/
public class Main2 {
public static int getMaxNum(String str) {
int max = 0;
int i = 0;
while (i+1 < str.length()) {
int count = 0;
int j = i;
while (j+1 < str.length()) {
if (str.charAt(j) - str.charAt(j + 1) != 0) {
j++;
count++;
}
else
break;
}
max = Math.max(max, count+1);
i = j+1;
}
return max;
}
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
String string = scanner.nextLine();
System.out.println(getMaxNum(string));
}
}