#include <bits/stdc++.h>
using namespace std;
int main()
{
string s;
int c=1,max=1;
cin>>s;
for(int i=0;s[i]!='\0';i++)
{
if(s[i]==s[i+1])
c++;
else
{
if(max<c)
max=c;
c=1;
}
}
cout<<c;
// your code goes here
return 0;
}
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