#include <stdio.h>
#include <ctype.h>

int main(void) {
	int i, j, numberOfColumns = 6;
	int rows = (256+numberOfColumns-1)/numberOfColumns;
	for (j = 0; j < rows; j++){
		for (i=0; i < numberOfColumns; i++){
			int character = rows*i + j;
			if(character >= 256)
            			break;
			printf("%3d = %c\t\t", character, isprint(character)?character:'_');
		}
		printf("\n");
	}
	// your code goes here
	return 0;
}