#include <stdio.h>
#include <string.h>

//排序
void Sort(int a[],int n)
{
	int i,j,t;
	for(i = 0; i < n-1; i++)
		for(j = 1; j < n-i; j++)
			if(a[j] < a[j-1])
			{
				t = a[j];
				a[j] = a[j-1];
				a[j-1] = t;
			}
} 
int main()
{
	int a[10000],i = 0,j,n = 0,sign,num;
	char s[10000];
	scanf("%s",s);
	while(s[i] != '\0')
	{
		j = i;
		sign = 1;
		num = 0;
		if(s[j] == '-')
			sign = -1,j++;
		while(s[j] >= '0' && s[j] <= '9')
			num = num*10+s[j]-'0',j++;
		if(s[j] == ',' || s[j] == '\0')
			a[n++] = num*sign;
		i = j+1;
		if(i >= strlen(s))	break;
	}
	Sort(a,n);
	for(i = 0; i < n; i++)
		if((i+1) % 4 == 0) printf("%d\n",a[i]);
		else printf("%d ",a[i]);
	
	return 0;
}