#include<stdio.h>
main()
{
int a[10][10],i,j;
a[10][10]={{1},{1},{1},{1},{1},{1},{1},{1},{1},{1}};
for(i=0;i<=8;i++)
for(j=0;j<=8;j++)
a[i+1][j+1]=a[i][j]+a[i][j+1];
for(i=0;i<=9;i++)
for(j=0;j<=9;j++)
if(a[i][j]!=0)
printf("%d",a[i][j]);
printf("\n");
}