#include <stdio.h>
int a[100];
static int c;
static int counter;
bool check(int n,int m,int k)
{
        int i;
        for(i=n;i>k;i--)
                if(m==a[i])return false;
        return true;
}
void quanpailie(int n,int k)
{
        int i,j;
        if(k>=1)
        {
                for(i=n;i>=1;i--)
                {
                        if(check(n,i,k))
                        {
                                a[k]=i;
                                quanpailie(n,k-1);
                        }
                }
        }
        else
        {
                for(j=c;j>=1;j--)
                        printf(" %d",a[j]);
                printf("\n");
                counter++;
        }
}

main()
{
        a[0]=9;
        c=5;
        counter=0;
        quanpailie(9,5);
        printf("%d",counter);
        return 0;
}