#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <bitset>
#include <vector>
#include <algorithm>
#include <map>
#include <set>
#include <cassert>

const int N = 2e5 + 7;
using namespace std;
string s;
int cnt;
int freq[30], mxFr;
int main()
{
#ifdef _DEBUG
    freopen("input.txt", "r", stdin);
#else
    //std::ios::sync_with_stdio(false);
   // cin.tie(0);
#endif
    cin >> s;
    for (int i = 0; i <= s.size() - 5; i++) {
        if (s[i] = 'C' && s[i + 1] == 'B' && s[i + 3] == 'B' && s[i + 4] == 'C') {
            char mid = s[i + 2];
            if (mid != 'A' && mid != 'B' && mid != 'F') {
                cnt++;
                freq[mid - 'A']++;
                mxFr = max(mxFr, freq[mid - 'A']);
            }
        }
    }
    cout << cnt << " ";
    for (int i = 0; i < 30; i++) {
        if (freq[i] == mxFr) {
            cout << char('A' + i);
        }
    }
}