#include <bits/stdc++.h>
using namespace std;
int main() {
  string s;
  cin >> s;
  int count = 0, ans = 0;
  for (int i = 0; i < s.length() - 1; i++) {
    if (s[i] == s[i + 1]) count++;
    if (ans < count) ans = count;
    if (s[i] != s[i + 1]) count = 0;
  }
  cout << (s.length() - ans);
}
