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

char PARA[1500];	// an input paragraph
int LN = 0;			// line number of printed text
int LW;				// line width of output lines

int read_para(void);
void print_lines(void);
void print_lines(void);
void print_titles(int length);
void print_para(int length);

int main(int argc, char *argv[]) 
{
	int i;

	LW = atoi(argv[1]) - 4;
	for (i = 0; i < 6; i++) {
		print_titles(read_para());
	}
	while (read_para() != -1) {
		print_para(read_para());
	}
}

int read_para(void)
{
	int i = 0;
	
	if ((PARA[0] = getchar()) == EOF) return -1;
	for (i = 1; (PARA[i] = getchar()) != '\n'; i++);
	PARA[i] = '\0';
	return i - 1;
}

void print_lines(void)
{
	LN++;
	if (LN % 5 == 0) printf("%3d ", LN);
	else printf("    ");		
}

void print_titles(int length)
{
	int i;

	print_lines();
	for (i = 0; i < (LW - length) / 2; i++) {
		printf(" ");
	}
	printf("%s\n", PARA);
}
void print_para(int length) 
{
	int i;
	int sp_pos;
	
	print_lines();
	/*if (length == 0) {
		print_lines();
	}*/
	for (i = 0; i <= length; i++) {
		if (i % LW == 0) {
			printf("\n");
			print_lines();
		}
		printf("%c", PARA[i]);
	}
	printf("\n");
}