import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Arrays;

class No345 {

	public static void main(String[] args) throws IOException {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String str = br.readLine();
		
		int [] C = new int[str.length()];
		Arrays.fill(C,0); 
		C[0] = str.indexOf("c");
		
		int [] length = new int[str.length()];
		Arrays.fill(length,-1); 
		
		for (int i=0; i<str.length(); i++){
			C[i+1] = str.indexOf("c",C[i]+1);  //次のcを探す位置は直前のcの位置+1から
			if(C[i] != -1){
				int W1 = str.indexOf("w",C[i]+1);  //1つめのwは直前のcの位置+1から
				int W2 = str.indexOf("w",W1+1);  //2つめのwは直前のwの位置+1から
				if(W1 != -1 && W2 != -1) length[i] = W2 - C[i] + 1; //c,w,wがあれば
			}
			else break;
		}
		int ans = length[0];
		for (int i = 1; i< length.length; i++){
			if (length[i] != -1 && length[i-1] > length[i]) ans = length[i];
		}
		System.out.println(ans);
	}
}