#include <bits/stdc++.h>
using namespace std;

int main()
{
	string N;
	cin >> N;

	int num = N.size();
	string b2;
	for( int i = 0; i < num; i++ ) {
		if( N[i] == 'A' ) b2 += string( "1010" );
		else if( N[i] == 'B' ) b2 += string( "1011" );
		else if( N[i] == 'C' ) b2 += string( "1100" );
		else if( N[i] == 'D' ) b2 += string( "1101" );
		else if( N[i] == 'E' ) b2 += string( "1110" );
		else if( N[i] == 'F' ) b2 += string( "1111" );
	}
	map<int, int> mp;
	num = b2.size();
	for( int i = num; i > 0; i -= 3 ) {
		int k = min( i, 3 );
		string s = b2.substr( i - k, k );
		int n = 0;
		for( int j = 0; j < k; j++ ) n = n * 2 + s[j] - '0';
		mp[n]++;
	}
	int ma = 0;
	for( auto it = mp.begin(); it != mp.end(); it++ ) {
		ma = max( ma, it->second );
	}

	int f = 0;
	for( auto it = mp.begin(); it != mp.end(); it++ ) {
		if( it->second == ma ) {
			if( f ) cout << " ";
			cout << it->first;
			f = 1;
		}
	}
	cout << endl;
}