#include <iostream> using namespace std; int main() { string a; cin>>a; int i=0; int len=a.size(); int ans=1; for(i=0;i<len;i++) { if(i+1<len && a[i]!=a[i+1]) { int count=1; while(i+1<len && a[i]!=a[i+1]) { count++; i++; } ans=max(ans,count); i--; } } cout<<ans; return 0; }