#include <bits/stdc++.h>
#define FOREACH(it,c) for( __typeof((c).begin()) it=(c).begin();it!=(c).end();it++)
#define FOR(a,b,c) for(int a=(b);a<=(c);++a)
#define ROF(a,b,c) for(int a=(b);a>=(c);--a)
#define dbg(x) cout<<#x<<" = "<<(x)<<"\n";
#define pii pair<int,int>
#define pil pair< pair< int, int> , ind >
#define mp make_pair
#define pb push_back
#define fi first.first
#define se first.second
#define ind second
#define ll long long
#define TATA NULL
using namespace std;
const int NMAX = 100002;
char s[NMAX],sol[NMAX];
int main(){
    #ifndef ONLINE_JUDGE
        freopen("data.in","r",stdin);
    #endif // ONLINE_JUDGE
    cin.sync_with_stdio(false);
    cin.tie(TATA);
    gets(s);
    int len = 0;
    for(int i=0;s[i];i++)
    {
        if(s[i]==',')
        {
            sol[++len] = ' ';
            sol[++len] = ',';
        }
        else
        {
            if(s[i]=='-' || s[i]=='.')
                continue;
            sol[++len] = s[i];
        }
    }


    cout<<(sol+1)<<"\n";
    return 0;
}