import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class pku3370_ {

	/**
	 * @param args
	 */
	static int v[],g[];
	static final int maxint=100002;
	static BufferedReader cin;
	public static void main(String[] args) throws IOException {
		
		//Scanner sc=new Scanner(System.in);
		cin=new BufferedReader(new InputStreamReader(System.in));
		v=new int[maxint];
		g=new int[maxint];
		int temp,k,q=0;
		while(true)
		{
			//int c=sc.nextInt();
			 String s1=cin.readLine();
			 String[] sa=s1.split(" ");
			//int n=sc.nextInt();
			int c=Integer.parseInt(sa[0]);
			int n=Integer.parseInt(sa[1]);
			if(n==0&&c==0)break;
			k=0;
			//g[0]=0;
			for(int i=0;i<=n;i++)
				v[i]=0;
			//	for(int i=0;i<=n;i++)
				g[0]=0;
			
			String s3=cin.readLine();
			sa=s3.split(" ");
			for(int i=1;i<=n;i++)
			{
				temp=Integer.parseInt(sa[i-1]);
				g[i]=(g[i-1]+temp)%c;
				if(v[g[i]]==0)v[g[i]]=i;
				else
				{
					k=i;
					q=g[i];
				}
			}
			if(k==0)System.out.println("no sweets");
			else
			{
			
			for(int i=v[q]+1;i<k;i++)
				System.out.print(i+" ");
			System.out.println(k);
			}
		}

	}

}