C++ :

#include<bits/stdc++.h>
using namespace std;
int main(){
	string s;
	char n;
	int cnt=0;
	cin>>s;
	for(int i=0;i<s.size();i++){
		int j=i,k=0;
		while(j<s.size()&&s[j]==s[i]){
			j++;
			k++;
		}i=j-1;
		if(k>cnt){
			cnt=k;
			n=s[i];
		}
	}cout<<n<<" "<<cnt;
	return 0;
}