Word Processor

// NgJaBach: Forever Meadow <3

#include<bits/stdc++.h>

using namespace std;
typedef long long int ll;
typedef unsigned long long ull;
#define pb push_back
#define pob pop_back
#define mp make_pair
#define upb upper_bound
#define lwb lower_bound
#define bend(a) a.begin(),a.end()
#define rev(x) reverse(bend(x))
#define mset(a) memset(a, 0, sizeof(a))
#define fi first
#define se second
#define gcd __gcd
#define getl(s) getline(cin, s);
#define setpre(x) fixed << setprecision(x)
#define endl '\n'
const int N=200050,M=1000000007;
const ll INF=1e18+7;
int main(){
    ios_base::sync_with_stdio(NULL); cin.tie(nullptr); cout.tie(nullptr);
    freopen("word.in","r",stdin);
    freopen("word.out","w",stdout);
    int n,k,cnt=0,m;
    string s,str;
    str.clear();
    cin>>n>>k;
    for(int i=0;i<n;++i){
        cin>>s;
        m=s.size();
        if(cnt+m<=k){
            cnt+=m;
            if(!str.empty()) str.pb(' ');
            str+=s;
        }
        else{
            cout<<str<<endl;
            str=s; cnt=m;
        }
    }
    cout<<str;
    return 0;
}
/*
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INPUT:                            |
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OUTPUT:                           |
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*/