include fstream using namespace std ifstream cin segredo in ofstream c

#include <fstream>

using namespace std;

ifstream cin("segredo.in");
ofstream cout("segredo.out");

int main(){
	char c; 
	int a[30],cnt=0;
	for(int i=0;i<=30;i++){
		a[i]=0;
	}
	
	int min=1001,max=0,max1=0;
	
	while(!cin.eof()){
		cin>>c;
		a[int(c)-96]++;
		if(max1<int(c)-96)max1=int(c)-96;
	}
	a[max1]--;
	
	for(int i=1;i<=26;i++){
		if(a[i]>0){
			if(a[i]<min)min=a[i];
			if(a[i]>max)max=a[i];
		}
	}
	
	for(int i=1;i<=26;i++){
		if(a[i]>0) if(a[i]==max)cout<<char(i+96);
	}
	
	cout<<endl;
	
	for(int i=1;i<=26;i++){
		if(a[i]>0) if(a[i]==min)cout<<char(i+96);
	}
	
	return 0;
}