function Main(input) {
	input = input.split("\n");
	var ans = 0;
	var res = 0;
	input = input[0];
	for (var i = 0; i < input.length; i++){
		if (input[i] == "…"){
			res++;
			ans = Math.max(ans, res);
		}else{
			res = 0;
		}
	}
	console.log(ans + "\n");

}

Main(require("fs").readFileSync("/dev/stdin", "utf8"));