#include <stdio.h>
#include <string.h>
#include <bits/stdc++.h>
using namespace std;	
int main() {
	char str[1010];
	while(gets(str)){
		int hash[256] = {0};
		int max;
		int length = strlen(str);
		int count = 0, kong = 0;
		for(int i = 0; i < length; ++i) {
			if(str[i] >= 'a' && str[i] <= 'z') {
				count++;
				hash[str[i]]++;	
			}
			else if(str[i] >= 'A' && str[i] <= 'Z') {
				count++;
				hash[str[i]]++;	
			}
			else kong++;
			if(hash[str[i]] >= max) max = hash[str[i]];
		}
		printf("%d\n%d\n", count, kong + 1);
		for(int i = 0; i < length; ++i) {
			if(hash[str[i]] == max) {
				printf("%c ", str[i]);
				hash[str[i]] = 0;
			}
		}
		printf("\n%d\n", max);
	}
	return 0;
} 

/*

This is An Pencil Case
18
5
i s
3

Hello World
10
2
l
3

Hello leeoo
10
2
e l o
3