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

int number = 0;

int main(int argc, char * argv[])
{
	if (argc == 2)
	{
		number = atoi(argv[1]);
	}
	
	int chan = 0;
	char c;
	while (c != EOF)
	{
		c = getchar();
		if (c == ':')
		{
			chan++;
		}
		if ((c == ' ')||(c == '\n'))
		{
			chan =0;
		}
		
		if (chan == number)
		{
			if (c == ':')
			{
				c = ' ';
			}
			putchar(c);
		}
		
	}
	
	return 0;
}