#include <bits/stdc++.h>
#define N 1001
#define M 10001
using namespace std;

ifstream fin("date.in");
ofstream fout("date.out");

char s[M], cuv[101][N],*p;
short int a[101][N],b[101][N];
int L,ct,n, S;
void Pcta()
{
    fin>>L;
    fin.get();
    fin.getline(s, M);
    p=strtok(s," ");
    strcpy(cuv[ct],"");
    while(p)
    {
        n=strlen(p);
        if(S+n+1<=L)
        {
            strcat(cuv[ct],p);
            strcat(cuv[ct]," ");
            S+=n+1;
        }
        else
        {
            ct++;
            strcat(cuv[ct],p);
            strcat(cuv[ct]," ");
            S=n+1;
        }
        p=strtok(0," ");
    }
    for(int i=0; i<=ct; i++)
        fout<<cuv[i]<<"\n";

    fout<<'\n';

}
void Pctb()
{
    int ok=0;
    for(int i=0; i<=ct && !ok; i++)
        for(int j=0; cuv[i][j] && !ok; j++)
            if(cuv[i][j]==' ' && (cuv[i+1][j]==' '||cuv[i+1][j-1]==' '|| cuv[i+1][j+1]==' '))
                    ok=1;
                    if(ok==1)   fout<<"DA\n" ;
                        else fout<<"NU\n";
                }

int main()
{
    Pcta();
    Pctb();
    return 0;
}