#include <stdio.h>
#include <stdlib.h>

int main()
{
	int num;
	scanf ("%d",&num);
	int numofcomma=1;
	int firstclass;
	int* digit;
	int i;
	if (num/1000==0)
	{
		printf("%d",num);
		return 0;
	}
	while (num/1000>0)
	{
		digit=(int *)malloc(sizeof(int)*1);
		digit[numofcomma-1]=num%1000;
		firstclass=num/1000;
		numofcomma++;
	}
	for (i=numofcomma-1;i<=0;i--)
	{
		if (i==0)
		{
			printf ("%d",firstclass);
		}
		else
		{
			printf (",%03d",digit[i]);
		}
	}
	free(digit);
	return 0;
}