#include <iostream>
#include <vector>
#include <string>
#include <map>
#include <queue>
#include <algorithm>
#include <string.h>

void u8toi(char *str, int *array) {
  int i;
  int n = strlen(str);
  for(i = 0; i < n; ++i) {
    int flag = str[i];
    int mask = ~flag;  
    mask |= (mask >> 1);
    mask |= (mask >> 2);
    mask |= (mask >> 4);
    int res = str[i] & mask;
    while( 0xC0 <= (unsigned char)flag ) {
      i += 1;
      flag <<= 1;
      res <<= 6;
      res |= str[i] & 0x3F; 
    }
    *array++ = res;
  }
  *array++ = 0;
}

int main() {
  char str[1000];
  scanf("%s", str);

  int str2[1000];
  u8toi(str, str2);

  char t[10] = "…";
  int t2[10];
  u8toi(t, t2);
  int c = t2[0];
  int res = 0;
  int temp = 0;
  for(int i = 0; str2[i] != 0; ++i) {
    if( str2[i] == c ) {
      temp += 1;
    }
    else {
      temp = 0;
    }
    res = std::max(temp, res);
  }

  std::cout << res << std::endl;

  return 0;
}