noname46

#include<bits/stdc++.h>


using namespace std;


#define ll long long


#define FORn(i, n) for(ll i = 1; i <= (n); i++)


#define sz(x) (x).size()








        /* ----------------- glob var ----------------- */

    string s, x;
    map<char, bool> a;
    int d;

/* ----------------- ~~~~~~~~ ----------------- */

int main(){

    // freopen("BL3.inp", "r", stdin);
    // freopen("BL3.out", "w", stdout);
    ios_base::sync_with_stdio(0); cin.tie(0);

        /* ----------------- main func ----------------- */

    getline(cin, s);
    s = " " + s;
    FORn(i, sz(s)){
        if(s[i - 1] == ' ' && s[i] != ' ')
            d++, s[i] &= '_';
        if(s[i] == ' ' || a[s[i] & '_']++ == 0) x += s[i];
    }
    s.erase(0, 1);
    cout << d << '\n' << s << '\n' << x;

/* ----------------- ~~~~~~~~~ ----------------- */

}