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#include <bits/stdc++.h>
using namespace std;
 
bool compare(const tuple<char, int>&i, const tuple<char, int>&j)
{
    return i.second > j.second;
}
 
int main() {
	// your code goes here
	string s;
	cin>>s;
	map<char,int> mp;
	for(int i=0;i<s.size();i++){
		if(mp.find(s[i]) != mp.end()){
			mp[s[i]]+=1;
		}
		else mp[s[i]]=1;
	}
	vector<tuple<char,int>> v;
	for(map<char,int>::iterator it=mp.begin(); it!=mp.end();it++){
		v.push_back(make_tuple(it->first, it->second));
	}
	sort(v.begin(), v.end(), compare);
	for(int i=0;i<v.size();i++){
		cout<<v[i][0]<<" "<<v[i][1]<<", ";
	}
	cout<<endl;
	return 0;
}

prog.cpp: In function ‘bool compare(const std::tuple<char, int>&, const std::tuple<char, int>&)’:
prog.cpp:6:14: error: ‘const class std::tuple<char, int>’ has no member named ‘second’
     return i.second > j.second;
              ^~~~~~
prog.cpp:6:25: error: ‘const class std::tuple<char, int>’ has no member named ‘second’
     return i.second > j.second;
                         ^~~~~~
prog.cpp: In function ‘int main()’:
prog.cpp:26:13: error: no match for ‘operator[]’ (operand types are ‘__gnu_cxx::__alloc_traits<std::allocator<std::tuple<char, int> > >::value_type {aka std::tuple<char, int>}’ and ‘int’)
   cout<<v[i][0]<<" "<<v[i][1]<<", ";
             ^
prog.cpp:26:27: error: no match for ‘operator[]’ (operand types are ‘__gnu_cxx::__alloc_traits<std::allocator<std::tuple<char, int> > >::value_type {aka std::tuple<char, int>}’ and ‘int’)
   cout<<v[i][0]<<" "<<v[i][1]<<", ";
                           ^

Standard output is empty