#include <iostream>
#include<cstring>
using namespace std;
int main(){
string s;
cin>>s;
long int high = -1,check = 0;
for(int i = 0;i<s.length()-1;i++)
{
if(s[i]==s[i+1])
check++;
else
if(check>high){
high = check;
check = 0;
}
}
cout<<high+1<<endl;
}
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