function Main(input) {
  var arr, ret, i, len;

  arr = input.match(/…+/g);
  len = (arr || []).length;
  ret = 0;
  for(i = 0; i < len; i++) {
    if(arr[i].length > ret) {
      ret = arr[i].length;
    }
  }

  console.log(ret);
}

// Don't edit this line!
Main(require("fs").readFileSync("/dev/stdin", "utf8"));