#include<bits/stdc++.h> //#define int long long using namespace std; vector <string> vec; bool cmp(string a,string b){ return a < b; } signed main(){ string s,ret = ""; getline(cin,s); int sum = 0; for (int i = 0;i < s.size();i++){ if (s[i] == ',' || s[i] == '.' || s[i] == ' ' || s[i] == '!'){ vec.push_back(ret); ret = ""; sum++; continue; } ret += s[i]; } sort(vec.begin(),vec.end(),cmp); cout<<sum; puts(""); for (int i = 0;i < vec.size();i++){ cout<<vec[i]<<'\n'; } return 0; }