#include <iostream>
#include <string>
#include <set>


using namespace std;

int appear[26];

int main(){
    // A : 65   a: 97
    int wordNum = 0;
    int alNum = 0;
    int max = 0x80000000;

    string str;

    while(cin >> str){
        ++ wordNum;
        alNum += str.size();

        for(int i = 0; i < str.size(); ++ i)
            if(str[i] < 97) ++ appear[str[i] - 'A'];
            else ++ appear[str[i] - 'a'];
    }

    for(int i = 0; i < 26; ++ i)
        if(max < appear[i])
            max = appear[i];

    cout << alNum << endl;
    cout << wordNum << endl;

    for(int i = 0; i < 26; ++ i)
        if(max == appear[i])
            printf("%c ", i + 'a');
    cout << endl;
    cout << max << endl;

    return 0;
}