process.stdin.resume();
process.stdin.setEncoding('utf8');
// 自分の得意な言語で
// Let's チャレンジ！！
var lines = [];
var reader = require('readline').createInterface({
  input: process.stdin,
  output: process.stdout
});
reader.on('line', (line) => {
  lines.push(line);
});
reader.on('close', () => {
  let s = lines[0];
  let count = 0;
  let ans = 0;
  for(let i = 0;i < s.length; i++) {
    if(s[i] == '…') {
      count++;
    }else {
      ans = Math.max(ans,count);
      count = 0;
    }
  }
  ans = Math.max(ans,count);
  console.log(ans);
});