import std.stdio, std.array, std.conv, std.string, std.algorithm, std.math, std.regex;

void main(){
    string s;
    s = readln().chomp();
    int cwln = -1;
    foreach(elm; matchAll(s, regex("c[^cw]*?w[^w]*?w"))){
        if(cwln < to!(int)(elm.hit.length))cwln=to!(int)(elm.hit.length);
    }
    cwln.writeln();
}



// 読み込み用
T readOne(T=size_t)(){
    return readln().chomp().split[0].to!T();
}

T[] readLine(T=size_t)(string op=" "){
	T[] ol;
	foreach(string elm; readln().chomp().split(op)){
		ol ~= elm.to!T();
	}
	return ol;
}